Carborane compounds and methods of use thereof

ABSTRACT

Disclosed herein are compounds comprising dicarba-closo-dodecaborane. The compounds can be, for example, estrogen receptor beta (ERβ) agonists. In some examples, the compounds can be selective ERβ agonists. Also provided herein are methods of treating, preventing, or ameliorating cancer in a subject, suppressing tumor growth in a subject, treating an inflammatory disease in a subject, treating a neurodegenerative disease in a subject, treating a psychotropic disorder in a subject, or a combination thereof, by administering to a subject a therapeutically effective amount of one or more of the compounds or compositions described herein, or a pharmaceutically acceptable salt thereof.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. application Ser. No.15/760,971 filed Mar. 16, 2018, which is a national stage applicationfiled under 35 U.S.C. § 371 of PCT/US2016/052531 filed Sep. 19, 2016,which claims priority to and the benefit of U.S. Provisional ApplicationNo. 62/219,998, filed Sep. 17, 2015, each of which is herebyincorporated herein by reference in its entirety.

BACKGROUND

Estrogen can influence the growth, differentiation, and functioning ofmany tissues. For example, estrogens play an important role in thefemale and male reproductive systems, and also in bone maintenance, thecentral nervous system, and the cardiovascular system. Because of theirbeneficial actions in non-reproductive tissues, such as bone, brain, andurogenital tract, estrogens would be ideal drugs if they did not haveserious adverse effects, such as increasing the risk of breast cancer,endometrial cancer, thromboembolisms, and strokes.

The physiological functions of estrogenic compounds are modulatedlargely by the estrogen receptor subtypes alpha (ERα) and beta (ERβ).The activity of the two ER subtypes is controlled by the binding of theendogenous hormone 17β-estradiol or of synthetic nonhormonal compoundsto the ligand-binding domain.

In humans, both receptor subtypes are expressed in many cells andtissues, and they can control physiological functions in various organsystems, such as reproductive, skeletal, cardiovascular, and centralnervous systems, as well as in specific tissues (such as breast andsubcompartments of prostate and ovary). ERα is present mainly in mammaryglands, uterus, ovary (thecal cells, bone, male reproductive organs(testes and epididumis), prostate (stroma), liver, and adipose tissue.By contrast, ERβ is found mainly in the prostate (epithelium), bladder,ovary (granulosa cells), colon, adipose tissue, and immune system. Bothsubtypes are markedly expressed in the cardiovascular and centralnervous systems, There are some common physiological roles for bothestrogen receptor subtypes, such as in the development and function ofthe ovaries, and in the protection of the cardiovascular system. Thealpha subtypes has a more prominent roles on the mammary gland anduterus, as well as on the preservation of skeletal homeostasis and theregulation of metabolism, The beta subtype seems to have a morepronounced effect on the central nervous and immune systems, and itgeneral counteracts the ERα-promoted cell hyperproliferation in tissuessuch as breast and uterus.

Compounds that either induce or inhibit cellular estrogen responses havepotential value as biochemical tools and candidates for drugdevelopment. Most estrogen receptor modulators are non-selective for theER subtypes, but is has been proposed that compounds with ER subtypeselectivity would be useful. However, the development of compoundspossessing ER subtype specificity still constitutes a major challenge,as the ligand binding domains of the two subtypes are very similar instructure and amino acid sequence.

SUMMARY

Disclosed herein are compounds comprising dicarba-closo-dodecaborane.Disclosed herein are compounds of Formula I, and pharmaceuticallyacceptable salts thereof:

wherein

Q is a substituted or unsubstituted dicarba-closo-dodecaborane cluster,and

and R¹ are attached to Q in a para configuration;

X is OH, NHR², SH, or S(O)(O)NHR²;

R¹ is substituted or unsubstituted C₄-C₂₀ alkyl, substituted orunsubstituted C₂-C₂₀ alkenyl, substituted or unsubstituted C₂-C₂₀alkynyl, substituted or unsubstituted C₃-C₂₀ alkylaryl, substituted orunsubstituted C₄-C₂₀ alkylcycloalkyl, substituted or unsubstitutedC₁-C₂₀ acyl, or NR³R⁴;

R² is H, OH, halogen, or substituted or unsubstituted C₁-C₄ alkyl;

R³ and R⁴ are independently selected from substituted or unsubstitutedC₁-C₂₀ alkyl, substituted or unsubstituted C₂-C₂₀ alkenyl, substitutedor unsubstituted C₂-C₂₀ alkynyl, substituted or unsubstituted C₂-C₂₀alkylaryl, substituted or unsubstituted C₄-C₂₀ alkylcycloalkyl, orsubstituted or unsubstituted C₁-C₂₀ acyl;

with the proviso that when X is OH, R¹ is not (CH₂)₅CH(CH₃)₂ or NH₂.

In some examples of Formula I, the carborane cluster can be substitutedwith a heteroatom. In some examples of Formula I, the carborane clustercan be substituted with an isotopically labeled atom (i.e., aradiolabeled atom). In some examples of Formula I, the carborane clustercan be isotopically-enriched with one or more boron-10 atoms (¹⁰B).

In some examples of Formula I, Q can be:

wherein

• is a carbon atom or a boron atom; and

∘ is C—H, C-halogen, C-alkyl, C—OH, C—NH₂, B—H, B-halogen, B-alkyl,B—OH, or B—NH₂.

In some examples of Formula I, X is OH.

In some examples of Formula I, R¹ is a substituted or unsubstitutedC₆-C₁₀ alkyl. In some examples of Formula I, R¹ is a C₆-C₁₀hydroxyalkyl. In some examples of Formula I, R¹ is a substituted orunsubstituted C₃-C₁₆ alkylaryl. In some examples of Formula I, R¹ is aC₃-C₁₆ hydroxyalkylaryl. In some examples of Formula I, R¹ is asubstituted or unsubstituted C₈-C₂₀ alkylaryl. In some examples ofFormula I, R¹ is a substituted or unsubstituted C₈-C₂₀ alkylcycloalkyl.In some examples of Formula I, R¹ is a C₈-C₂₀hydroxyalkylarylcycloalkyl. In some examples of Formula I, R¹ is asubstituted or unsubstituted C₅-C₁₀ acyl. In some examples of Formula I,R¹ is a substituted or unsubstituted branched C₄-C₁₀ alkyl. In someexamples of Formula I, R¹ is a branched C₄-C₁₀ hydroxyalkyl.

In some examples of Formula I, the compounds can be of Formula II, or apharmaceutically acceptable salt thereof:

wherein

• is a carbon atom;

∘ is B—H, B-halogen, B-alkyl, B—OH, or B—NH₂;

X is OH, NHR², SH, or S(O)(O)NHR²;

R¹ is substituted or unsubstituted C₄-C₂₀ alkyl, substituted orunsubstituted C₂-C₂₀ alkenyl, substituted or unsubstituted C₂-C₂₀alkynyl, substituted or unsubstituted C₃-C₂₀ alkylaryl, substituted orunsubstituted C₄-C₂₀ alkylcycloalkyl, substituted or unsubstitutedC₁-C₂₀ acyl, or NR³R⁴;

R² is H, OH, halogen, or substituted or unsubstituted C₁-C₄ alkyl; and

R³ and R⁴ are independently selected from substituted or unsubstitutedC₁-C₂₀ alkyl, substituted or unsubstituted C₂-C₂₀ alkenyl, substitutedor unsubstituted C₂-C₂₀ alkynyl, substituted or unsubstituted C₂-C₂₀alkylaryl, substituted or unsubstituted C₄-C₂₀ alkylcycloalkyl, orsubstituted or unsubstituted C₁-C₂₀ acyl;

with the proviso that when X is OH, R¹ is not (CH₂)₅CH(CH₃)₂ or NH₂.

In some examples of Formula II, the carborane cluster can include aheteroatom.

In some examples of Formula II, the carborane cluster can include anisotopically labeled atom (i.e., a radiolabeled atom). In some examplesof Formula II, the carborane cluster can include an isotopically labeledBoron atom (e.g., ¹⁰B).

In some examples of Formula II, X is OH.

In some examples of Formula II, R¹ is a substituted or unsubstitutedC₆-C₁₀ alkyl. In some examples of Formula II, R¹ is a C₆-C₁₀hydroxyalkyl. In some examples of Formula II, R¹ is a substituted orunsubstituted C₃-C₁₆ alkylaryl. In some examples of Formula II, R¹ is aC₃-C₁₆ hydroxyalkylaryl. In some examples of Formula II, R¹ is asubstituted or unsubstituted C₈-C₂₀ alkylaryl. In some examples ofFormula I, R¹ is a substituted or unsubstituted C₈-C₂₀ alkylcycloalkyl.In some examples of Formula II, R¹ is a C₈-C₂₀hydroxyalkylarylcycloalkyl. In some examples of Formula II, R¹ is asubstituted or unsubstituted C₅-C₁₀ acyl. In some examples of FormulaII, R¹ is a substituted or unsubstituted branched C₄-C₁₀ alkyl. In someexamples of Formula II, R¹ is a branched C₄-C₁₀ hydroxyalkyl.

In some examples of Formula II, the compounds can be of Formula III, ora pharmaceutically acceptable salt thereof:

wherein

• is a carbon atom;

∘ is B—H, B-halogen, B-alkyl, B—OH, or B—NH₂;

the dotted line to Y indicates that the bond can be a single bond or adouble bond, as valence permits;

X is OH, NHR², SH, or S(O)(O)NHR²;

Y is O, OR^(2′), NHR², SH, or S(O)(O)NHR²;

R⁵ is substituted or unsubstituted C₂-C₁₉ alkyl, substituted orunsubstituted C₂-C₁₉ alkenyl, substituted or unsubstituted C₂-C₁₉alkynyl, substituted or unsubstituted C₂-C₁₉ alkylaryl, or substitutedor unsubstituted C₃-C₁₉ alkylcycloalkyl, or NR³R⁴;

R² is H, OH, halogen, or substituted or unsubstituted C₁-C₄ alkyl;

R^(2′) is H or substituted or unsubstituted C₁-C₄ alkyl; and

R³ and R⁴ are independently selected from substituted or unsubstitutedC₁-C₂₀ alkyl, substituted or unsubstituted C₂-C₂₀ alkenyl, substitutedor unsubstituted C₂-C₂₀ alkynyl, substituted or unsubstituted C₂-C₂₀alkylaryl, substituted or unsubstituted C₄-C₂₀ alkylcycloalkyl, orsubstituted or unsubstituted C₁-C₂₀ acyl.

In some examples of Formula III, the carborane cluster can include aheteroatom. In some examples of Formula III, the carborane cluster caninclude an isotopically labeled atom (i.e., a radiolabeled atom). Insome examples of Formula III, the carborane cluster can include anisotopically labeled Boron atom (e.g., ¹⁰B).

In some examples of Formula III, X is OH.

In some examples of Formula III, Y is OH. In some examples of FormulaIII, Y is O.

In some examples of Formula III, R⁵ is a substituted or unsubstitutedC₃-C₉ alkyl. In some examples of Formula III, R⁵ is a substituted orunsubstituted C₆-C₉ alkyl. In some examples of Formula III, R⁵ is asubstituted or unsubstituted C₂-C₁₅ alkylaryl. In some examples ofFormula III, R⁵ is a substituted or unsubstituted C₈-C₂₀alkylarylcycloalkyl. In some examples of Formula III, R⁵ is asubstituted or unsubstituted branched C₂-C₉ alkyl.

Also disclosed herein are compounds of Formula IV, and pharmaceuticallyacceptable salts thereof:

wherein

Q is a substituted or unsubstituted dicarba-closo-dodecaborane cluster,and

are attached to Q in a para configuration;

the dotted line to Y indicates that the bond can be a single bond or adouble bond, as valence permits;

X is OH, NHR², SH, or S(O)(O)NHR²;

Y is O, OR^(2′), NHR², SH, or S(O)(O)NHR²;

R⁶ is substituted or unsubstituted C₁-C₂₀ alkyl, substituted orunsubstituted C₂-C₂₀ alkenyl, substituted or unsubstituted C₂-C₂₀alkynyl, substituted or unsubstituted C₂-C₂₀ alkylaryl, or substitutedor unsubstituted C₄-C₂₀ alkylcycloalkyl, or NR³R⁴;

R² is H, OH, halogen, or substituted or unsubstituted C₁-C₄ alkyl;

R^(2′) is H or substituted or unsubstituted C₁-C₄ alkyl; and

R³ and R⁴ are independently selected from substituted or unsubstitutedC₁-C₂₀ alkyl, substituted or unsubstituted C₂-C₂₀ alkenyl, substitutedor unsubstituted C₂-C₂₀ alkynyl, substituted or unsubstituted C₂-C₂₀alkylaryl, substituted or unsubstituted C₄-C₂₀ alkylcycloalkyl, orsubstituted or unsubstituted C₁-C₂₀ acyl;

with the proviso that when X is OH, R⁶ is not CH₂OH, CH(CH₃)OH,CH₂CH₂OH, CH₂CH₂CH₂OH, (CH₂)₅CH(CH₃)₂, or NH₂.

In some examples of Formula IV, the carborane cluster can include aheteroatom. In some examples of Formula IV, the carborane cluster caninclude an isotopically labeled atom (i.e., a radiolabeled atom). Insome examples of Formula IV, the carborane cluster can include anisotopically labeled Boron atom (e.g., ¹⁰B).

In some examples of Formula IV, Q can be

wherein

• is a carbon atom or a boron atom; and

∘ is C—H, C-halogen, C-alkyl, C—OH, C—NH₂, B—H, B-halogen, B-alkyl,B—OH, or B—NH₂.

In some examples of Formula IV, X is OH.

In some examples of Formula IV, Y is OH. In some examples of Formula IV,Y is O.

In some examples of Formula IV, R⁶ is a substituted or unsubstitutedC₆-C₁₀ alkyl. In some examples of Formula IV, R⁶ is a substituted orunsubstituted C₂-C₁₅ alkylaryl. In some examples of Formula IV, R⁶ is asubstituted or unsubstituted C₈-C₂₀ alkylarylcycloalkyl. In someexamples of Formula IV, R⁶ is a substituted or unsubstituted branchedC₃-C₁₀ alkyl.

In some examples of Formula IV, the compounds can be of Formula V, or apharmaceutically acceptable salt thereof:

wherein

• is a carbon atom;

∘ is B—H, B-halogen, B-alkyl, B—OH, or B—NH₂;

the dotted line to Y indicates that the bond can be a single bond or adouble bond, as valence permits;

X is OH, NHR², SH, or S(O)(O)NHR²;

Y is O, OR^(2′), NHR², SH, or S(O)(O)NHR²;

R⁶ is substituted or unsubstituted C₁-C₂₀ alkyl, substituted orunsubstituted C₂-C₂₀ alkenyl, substituted or unsubstituted C₂-C₂₀alkynyl, substituted or unsubstituted C₂-C₂₀ alkylaryl, or substitutedor unsubstituted C₄-C₂₀ alkylcycloalkyl, or NR³R⁴;

R² is H, OH, halogen, or substituted or unsubstituted C₁-C₄ alkyl;

R^(2′) is H or substituted or unsubstituted C₁-C₄ alkyl; and

R³ and R⁴ are independently selected from substituted or unsubstitutedC₁-C₂₀ alkyl, substituted or unsubstituted C₂-C₂₀ alkenyl, substitutedor unsubstituted C₂-C₂₀ alkynyl, substituted or unsubstituted C₂-C₂₀alkylaryl, substituted or unsubstituted C₄-C₂₀ alkylcycloalkyl, orsubstituted or unsubstituted C₁-C₂₀ acyl;

with the proviso that when X is OH, R⁶ is not CH₂OH, CH(CH₃)OH,CH₂CH₂OH, CH₂CH₂CH₂OH, (CH₂)₅CH(CH₃)₂, or NH₂.

In some examples of Formula V, the carborane cluster can include aheteroatom. In some examples of Formula V, the carborane cluster caninclude an isotopically labeled atom (i.e., a radiolabeled atom). Insome examples of Formula V, the carborane cluster can include anisotopically labeled Boron atom (e.g., ¹⁰B).

In some examples of Formula V, X is OH.

In some examples of Formula V, Y is OH. In some examples of Formula V, Yis O.

In some examples of Formula V, R⁶ is a substituted or unsubstitutedC₆-C₁₀ alkyl. In some examples of Formula V, R⁶ is a substituted orunsubstituted C₂-C₁₅ alkylaryl. In some examples of Formula V, R⁶ is asubstituted or unsubstituted C₈-C₂₀ alkylarylcycloalkyl. In someexamples of Formula V, R⁶ is a substituted or unsubstituted branchedC₃-C₁₀ alkyl.

Also disclosed herein are compounds of Formula VI, and pharmaceuticallyacceptable salts thereof:

wherein

Q is a substituted or unsubstituted dicarba-closo-dodecaborane cluster,and

and R⁷ are attached to Q in a para configuration;

X is OH, NHR², SH, or S(O)(O)NHR²;

R⁷ is substituted or unsubstituted C₁-C₁₄ alkyl, substituted orunsubstituted C₂-C₁₄ alkenyl, substituted or unsubstituted C₂-C₁₄alkynyl, substituted or unsubstituted C₁-C₁₄ acyl, or NR³R⁴;

R⁸, R⁹, R¹⁰, R¹¹, and R¹² are independently H, OH, halogen, substitutedor unsubstituted C₁-C₂₀ alkyl, sub substituted or unsubstituted C₂-C₂₀alkenyl, substituted or unsubstituted C₂-C₂₀ alkynyl, substituted orunsubstituted C₂-C₂₀ alkylaryl, substituted or unsubstituted C₄-C₂₀alkylcycloalkyl, substituted or unsubstituted C₁-C₂₀ acyl, or NR³R⁴, orwherein, as valence permits, R⁸ and R⁹, R⁹ and R¹⁰, R¹⁰ and R¹¹, or R¹¹and R¹², together with the atoms to which they are attached, form a 3-10membered substituted or unsubstituted cyclic moiety optionally includingfrom 1 to 3 heteroatoms;

R² is H, OH, halogen, or substituted or unsubstituted C₁-C₄ alkyl; and

R³ and R⁴ are independently selected from substituted or unsubstitutedC₁-C₂₀ alkyl, substituted or unsubstituted C₂-C₂₀ alkenyl, substitutedor unsubstituted C₂-C₂₀ alkynyl, substituted or unsubstituted C₂-C₂₀alkylaryl, substituted or unsubstituted C₄-C₂₀ alkylcycloalkyl, orsubstituted or unsubstituted C₁-C₂₀ acyl.

In some examples of Formula VI, the carborane cluster can include aheteroatom. In some examples of Formula VI, the carborane cluster caninclude an isotopically labeled atom (i.e., a radio labeled atom). Insome examples of Formula VI, the carborane cluster can include anisotopically labeled Boron atom (e.g., ¹⁰B).

In some examples of Formula VI, Q can be

wherein

• is a carbon atom or a boron atom; and

∘ is C—H, C-halogen, C-alkyl, C—OH, C—NH₂, B—H, B-halogen, B-alkyl,B—OH, or B—NH₂.

In some examples of Formula VI, X is OH.

In some examples of Formula VI, R⁷ is a substituted or unsubstitutedC₁-C₇ alkyl. In some examples of Formula VI, R⁷ is a C₁-C₇ hydroxyalkyl.

In some examples of Formula VI, R⁸-R¹² are independently H, OH, halogen,or substituted or unsubstituted C₁-C₄ alkyl, or wherein, as valencepermits, R⁸ and R⁹, R⁹ and R¹⁰, R¹⁰ and R¹¹, or R¹¹ and R¹², togetherwith the atoms to which they are attached, form a 3-10 memberedsubstituted or unsubstituted cyclic moiety optionally including from 1to 3 heteroatoms. In some examples of Formula VI, R⁸-R¹² are each H. Insome examples of Formula VI, R⁸, R¹⁰, and R¹² are each H, and R⁹ andR¹⁰, together with the atoms to which they are attached, form asubstituted or unsubstituted 5-7 membered cyclic moiety.

In some examples of Formula VI, the compounds can be of Formula VII, ora pharmaceutically acceptable salt thereof:

wherein

• is a carbon atom;

∘ is B—H, B-halogen, B-alkyl, B—OH, or B—NH₂;

X is OH, NHR², SH, or S(O)(O)NHR²;

R⁷ is substituted or unsubstituted C₁-C₁₄ alkyl, substituted orunsubstituted C₂-C₁₄ alkenyl, substituted or unsubstituted C₂-C₁₄alkynyl, substituted or unsubstituted C₁-C₁₄ acyl, or NR³R⁴;

R⁸, R⁹, R¹⁰, R¹¹, and R¹² are independently H, OH, halogen, substitutedor unsubstituted C₁-C₂₀ alkyl, sub substituted or unsubstituted C₂-C₂₀alkenyl, substituted or unsubstituted C₂-C₂₀ alkynyl, substituted orunsubstituted C₂-C₂₀ alkylaryl, substituted or unsubstituted C₄-C₂₀alkylcycloalkyl, substituted or unsubstituted C₁-C₂₀ acyl, or NR³R⁴, orwherein, as valence permits, R⁸ and R⁹, R⁹ and R¹⁰, R¹⁰ and R¹¹, or R¹¹and R¹², together with the atoms to which they are attached, form a 3-10membered substituted or unsubstituted cyclic moiety optionally includingfrom 1 to 3 heteroatoms;

R² is H, OH, halogen, or substituted or unsubstituted C₁-C₄ alkyl; and

R³ and R⁴ are independently selected from substituted or unsubstitutedC₁-C₂₀ alkyl, substituted or unsubstituted C₂-C₂₀ alkenyl, substitutedor unsubstituted C₂-C₂₀ alkynyl, substituted or unsubstituted C₂-C₂₀alkylaryl, substituted or unsubstituted C₄-C₂₀ alkylcycloalkyl, orsubstituted or unsubstituted C₁-C₂₀ acyl.

In some examples of Formula VII, the carborane cluster can include aheteroatom. In some examples of Formula VII, the carborane cluster caninclude an isotopically labeled atom (i.e., a radiolabeled atom). Insome examples of Formula VII, the carborane cluster can include anisotopically labeled Boron atom (e.g., ¹⁰B).

In some examples of Formula VII, X is OH.

In some examples of Formula VII, R⁷ is a substituted or unsubstitutedC₁-C₇ alkyl. In some examples of Formula VII, R⁷ is a C₁-C₇hydroxyalkyl.

In some examples of Formula VII, R⁸-R¹² are independently H, OH,halogen, or substituted or unsubstituted C₁-C₄ alkyl, or wherein, asvalence permits, R⁸ and R⁹, R⁹ and R¹⁰, R¹⁰ and R¹¹, or R¹¹ and R¹²,together with the atoms to which they are attached, form a 3-10 memberedsubstituted or unsubstituted cyclic moiety optionally including from 1to 3 heteroatoms. In some examples of Formula VII, R⁸-R¹² are each H. Insome examples of Formula VII, R⁸, R¹⁰, and R¹² are each H, and R⁹ andR¹⁰, together with the atoms to which they are attached, form asubstituted or unsubstituted 5-7 membered cyclic moiety.

Also disclosed herein are compounds of Formula VIII, andpharmaceutically acceptable salts thereof:

wherein

Q is a substituted or unsubstituted dicarba-closo-dodecaborane cluster,and

and R¹³ are attached to Q in a para configuration;

X is OH, NHR², SH, or S(O)(O)NHR²;

R¹³ is substituted or unsubstituted C₁-C₁₉ alkyl, substituted orunsubstituted C₂-C₁₉ alkenyl, substituted or unsubstituted C₂-C₁₉alkynyl, or substituted or unsubstituted C₁-C₂₀ acyl; and

R¹⁴, R¹⁵, and R¹⁶ are independently hydrogen, halogen, hydroxyl,substituted or unsubstituted C₁-C₁₈ alkyl, substituted or unsubstitutedC₂-C₁₈ alkenyl, substituted or unsubstituted C₁-C₁₈ alkynyl, substitutedor unsubstituted C₂-C₁₈ aryl, substituted or unsubstituted C₃-C₁₈cycloalkyl, substituted or unsubstituted C₁-C₂₀ acyl, or NR³R⁴, orwherein, as valence permits, R¹⁴ and R¹⁵, R¹⁴ and R¹⁶, or R¹⁵ and R¹⁶,together with the atoms to which they are attached, for a 3-10 memberedsubstituted or unsubstituted cyclic moiety optionally including from 1to 3 heteroatoms,

with the proviso that at least two of R¹⁴, R¹⁵ and R¹⁶ are not hydrogen,halogen, or hydroxyl; and

with the proviso that when X is OH and R¹³ is a C₅ alkyl, R¹⁴, R¹⁵, andR¹⁶ are not H, methyl, and methyl.

In some examples of Formula VIII, the carborane cluster can include aheteroatom. In some examples of Formula VIII, the carborane cluster caninclude an isotopically labeled atom (i.e., a radio labeled atom). Insome examples of Formula VIII, the carborane cluster can include anisotopically labeled Boron atom (e.g., ¹⁰B). In some examples of FormulaVIII, Q is

wherein

• is a carbon atom or a boron atom; and

∘ is C—H, C-halogen, C-alkyl, C—OH, C—NH₂, B—H, B-halogen, B-alkyl,B—OH, or B—NH₂.

In some examples of Formula VIII, X is OH.

In some examples of Formula VIII, R¹³ is a substituted or unsubstitutedC₄-C₈ alkyl. In some examples of Formula VIII, R¹³ is a C₄-C₈hydroxyalkyl.

In some examples of Formula VIII, R¹⁴-R¹⁶ are independently hydrogen,halogen, hydroxyl, substituted or unsubstituted C₁-C₄ alkyl, with theproviso that at least two of R¹⁴, R¹⁵ and R¹⁶ are not hydrogen, halogen,or hydroxyl; and with the proviso that when X is OH and R¹³ is a C₅alkyl, R¹⁴, R¹⁵, and R¹⁶ are not H, methyl, and methyl.

In some examples of Formula VIII, the compounds can be of Formula IX, ora pharmaceutically acceptable salt thereof:

wherein

• is a carbon atom;

∘ is B—H, B-halogen, B-alkyl, B—OH, or B—NH₂;

X is OH, NHR², SH, or S(O)(O)NHR²;

R¹³ is substituted or unsubstituted C₁-C₁₉ alkyl, substituted orunsubstituted C₂-C₁₉ alkenyl, substituted or unsubstituted C₂-C₁₉alkynyl, or substituted or unsubstituted C₁-C₂₀ acyl; and

R¹⁴, R¹⁵, and R¹⁶ are independently hydrogen, halogen, hydroxyl,substituted or unsubstituted C₁-C₁₈ alkyl, substituted or unsubstitutedC₂-C₁₈ alkenyl, substituted or unsubstituted C₁-C₁₈ alkynyl, substitutedor unsubstituted C₂-C₁₈ aryl, substituted or unsubstituted C₃-C₁₈cycloalkyl, substituted or unsubstituted C₁-C₂₀ acyl, or NR³R⁴, orwherein, as valence permits, R¹⁴ and R¹⁵, R¹⁴ and R¹⁶, or R¹⁵ and R¹⁶,together with the atoms to which they are attached, for a 3-10 memberedsubstituted or unsubstituted cyclic moiety optionally including from 1to 3 heteroatoms,

with the proviso that at least two of R¹⁴, R¹⁵ and R¹⁶ are not hydrogen,halogen, or hydroxyl; and

with the proviso that when X is OH and R¹³ is a C₅ alkyl, R¹⁴, R¹⁵, andR¹⁶ are not H, methyl, and methyl.

In some examples of Formula IX, the carborane cluster can include aheteroatom. In some examples of Formula IX, the carborane cluster caninclude an isotopically labeled atom (i.e., a radio labeled atom). Insome examples of Formula IX, the carborane cluster can include anisotopically labeled Boron atom (e.g., ¹⁰B).

In some examples of Formula IX, X is OH.

In some examples of Formula IX, R¹³ is a substituted or unsubstitutedC₄-C₈ alkyl. In some examples of Formula IX, R¹³ is a C₄-C₈hydroxyalkyl.

In some examples of Formula IX, R¹⁴-R¹⁶ are independently hydrogen,halogen, hydroxyl, substituted or unsubstituted C₁-C₄ alkyl, with theproviso that at least two of R¹⁴, R¹⁵ and R¹⁶ are not hydrogen, halogen,or hydroxyl; and with the proviso that when X is OH and R¹³ is a C₅alkyl, R¹⁴, R¹⁵, and R¹⁶ are not H, methyl, and methyl.

In some examples, the compounds can be selected from the groupconsisting of:

and pharmaceutically acceptable salts thereof. In some examples, thecarborane cluster can include a heteroatom. In some examples, thecarborane cluster can include an isotopically labeled atom (i.e., aradiolabeled atom). In some examples, the carborane cluster can includean isotopically labeled Boron atom (e.g., ¹⁰B).

In some examples, the compounds disclosed herein can have an EC₅₀ of 800nM or less at estrogen receptor beta (ERβ). In some examples, thecompounds disclosed herein can have an an EC₅₀ of 6 nM or less atestrogen receptor beta (ERβ). In some examples, the compounds disclosedherein can have an EC₅₀ in the subnanomolar range (e.g., an EC₅₀ of lessthan 1 nM, an EC₅₀ of 0.5 nM or less, or an EC₅₀ of 0.1 nM or less).

In some examples, the compounds disclosed herein can have an ERβ-to-ERαagonist ratio of 8 or more. In some examples, the compounds disclosedherein can have an ERβ-to-ERα agonist ratio of 400 or more.

Some compounds disclosed herein have selectivity for ERβ over ERα andthus exert agonist activity on ERβ without undesired effects on ERα.Therefore the compounds can be used in the treatment of variousERβ-related (ERβ-mediated) diseases, for examples cancers, inflammatorydiseases, neurodegenerative diseases, cardiovascular diseases, benignprostate hyperplasia and osteoporosis.

Also provided herein are methods of treating, preventing, orameliorating cancer in a subject. The methods include administering to asubject a therapeutically effective amount of one or more of thecompounds or compositions described herein, or a pharmaceuticallyacceptable salt thereof. In some examples, the cancer can be selectedfrom the group consisting of breast cancer, colorectal cancer,endometrial cancer, ovarian cancer, and prostate cancer. The methods oftreatment or prevention of cancer described herein can further includetreatment with one or more additional agents (e.g., an anti-cancer agentor ionizing radiation).

Also described herein are methods of suppressing tumor growth in asubject. The method includes contacting at least a portion of the tumorwith a therapeutically effective amount of a compound or composition asdescribed herein, and optionally includes the step of irradiating atleast a portion of the tumor with a therapeutically effective amount ofionizing radiation.

Also described herein are methods of treating an inflammatory disease ina subject. The methods can include administering to the subject atherapeutically effective amount of a compound or a composition asdescribed herein. In some examples, the inflammatory disease is selectedfrom the group consisting of arthritis and inflammatory bowel disease.The methods of treatment of inflammatory diseases described herein canfurther include treatment with one or more additional agents (e.g., ananti-inflammatory agent).

Also disclosed herein are methods of treating a neurodegenerativedisease in a subject. The methods can comprise administering to thesubject a therapeutically effective amount of a compound or acomposition as described herein.

Also disclosed herein are methods of treating a psychotropic disorder ina subject. The methods can comprise administering to the subject atherapeutically effective amount of a compound or a composition asdescribed herein.

Also disclosed herein are methods of imaging a cell or a population ofcells expressing ERβ within or about a subject. The methods can compriseadministering to the subject an amount of a compound or a composition asdescribed herein; and detecting the compound or the composition.

The details of one or more embodiments of the invention are set forth inthe accompanying drawings and the description below. Other features,objects, and advantages of the invention will be apparent from thedescription and drawings, and from the claims.

DETAILED DESCRIPTION

The compounds, compositions, and methods described herein may beunderstood more readily by reference to the following detaileddescription of specific aspects of the disclosed subject matter and theExamples included therein.

Before the present compounds, compositions, and methods are disclosedand described, it is to be understood that the aspects described beloware not limited to specific synthetic methods or specific reagents, assuch may, of course, vary. It is also to be understood that theterminology used herein is for the purpose of describing particularaspects only and is not intended to be limiting.

Also, throughout this specification, various publications arereferenced. The disclosures of these publications in their entiretiesare hereby incorporated by reference into this application in order tomore fully describe the state of the art to which the disclosed matterpertains. The references disclosed are also individually andspecifically incorporated by reference herein for the material containedin them that is discussed in the sentence in which the reference isrelied upon.

General Definitions

In this specification and in the claims that follow, reference will bemade to a number of terms, which shall be defined to have the followingmeanings.

Throughout the description and claims of this specification the word“comprise” and other forms of the word, such as “comprising” and“comprises,” means including but not limited to, and is not intended toexclude, for example, other additives, components, integers, or steps.

As used in the description and the appended claims, the singular forms“a,” “an,” and “the” include plural referents unless the context clearlydictates otherwise. Thus, for example, reference to “a composition”includes mixtures of two or more such compositions, reference to “anagent” includes mixtures of two or more such agents, reference to “thecomponent” includes mixtures of two or more such components, and thelike.

“Optional” or “optionally” means that the subsequently described eventor circumstance can or cannot occur, and that the description includesinstances where the event or circumstance occurs and instances where itdoes not.

Ranges can be expressed herein as from “about” one particular value,and/or to “about” another particular value. By “about” is meant within5% of the value, e.g., within 4, 3, 2, or 1% of the value. When such arange is expressed, another aspect includes from the one particularvalue and/or to the other particular value. Similarly, when values areexpressed as approximations, by use of the antecedent “about,” it willbe understood that the particular value forms another aspect. It will befurther understood that the endpoints of each of the ranges aresignificant both in relation to the other endpoint, and independently ofthe other endpoint.

It is understood that throughout this specification the identifiers“first” and “second” are used solely to aid in distinguishing thevarious components and steps of the disclosed subject matter. Theidentifiers “first” and “second” are not intended to imply anyparticular order, amount, preference, or importance to the components orsteps modified by these terms.

As used herein, by a “subject” is meant an individual. Thus, the“subject” can include domesticated animals (e.g., cats, dogs, etc.),livestock (e.g., cattle, horses, pigs, sheep, goats, etc.), laboratoryanimals (e.g., mouse, rabbit, rat, guinea pig, etc.), and birds.“Subject” can also include a mammal, such as a primate or a human. Thus,the subject can be a human or veterinary patient. The term “patient”refers to a subject under the treatment of a clinician, e.g., physician.

The term “inhibit” refers to a decrease in an activity, response,condition, disease, or other biological parameter. This can include butis not limited to the complete ablation of the activity, response,condition, or disease. This can also include, for example, a 10%reduction in the activity, response, condition, or disease as comparedto the native or control level. Thus, the reduction can be a 10, 20, 30,40, 50, 60, 70, 80, 90, 100%, or any amount of reduction in between ascompared to native or control levels.

By “reduce” or other forms of the word, such as “reducing” or“reduction,” is meant lowering of an event or characteristic (e.g.,tumor growth). It is understood that this is typically in relation tosome standard or expected value, in other words it is relative, but thatit is not always necessary for the standard or relative value to bereferred to. For example, “reduces tumor growth” means reducing the rateof growth of a tumor relative to a standard or a control.

By “prevent” or other forms of the word, such as “preventing” or“prevention,” is meant to stop a particular event or characteristic, tostabilize or delay the development or progression of a particular eventor characteristic, or to minimize the chances that a particular event orcharacteristic will occur. Prevent does not require comparison to acontrol as it is typically more absolute than, for example, reduce. Asused herein, something could be reduced but not prevented, but somethingthat is reduced could also be prevented. Likewise, something could beprevented but not reduced, but something that is prevented could also bereduced. It is understood that where reduce or prevent are used, unlessspecifically indicated otherwise, the use of the other word is alsoexpressly disclosed. For example, the terms “prevent” or “suppress” canrefer to a treatment that forestalls or slows the onset of a disease orcondition or reduced the severity of the disease or condition. Thus, ifa treatment can treat a disease in a subject having symptoms of thedisease, it can also prevent or suppress that disease in a subject whohas yet to suffer some or all of the symptoms.

The term “treatment” refers to the medical management of a patient withthe intent to cure, ameliorate, stabilize, or prevent a disease,pathological condition, or disorder. This term includes activetreatment, that is, treatment directed specifically toward theimprovement of a disease, pathological condition, or disorder, and alsoincludes causal treatment, that is, treatment directed toward removal ofthe cause of the associated disease, pathological condition, ordisorder. In addition, this term includes palliative treatment, that is,treatment designed for the relief of symptoms rather than the curing ofthe disease, pathological condition, or disorder; preventativetreatment, that is, treatment directed to minimizing or partially orcompletely inhibiting the development of the associated disease,pathological condition, or disorder; and supportive treatment, that is,treatment employed to supplement another specific therapy directedtoward the improvement of the associated disease, pathologicalcondition, or disorder.

The term “anticancer” refers to the ability to treat or control cellularproliferation and/or tumor growth at any concentration.

The term “therapeutically effective” refers to the amount of thecomposition used is of sufficient quantity to ameliorate one or morecauses or symptoms of a disease or disorder. Such amelioration onlyrequires a reduction or alteration, not necessarily elimination.

The term “pharmaceutically acceptable” refers to those compounds,materials, compositions, and/or dosage forms which are, within the scopeof sound medical judgment, suitable for use in contact with the tissuesof human beings and animals without excessive toxicity, irritation,allergic response, or other problems or complications commensurate witha reasonable benefit/risk ratio.

Chemical Definitions

Terms used herein will have their customary meaning in the art unlessspecified otherwise. The organic moieties mentioned when definingvariable positions within the general formulae described herein (e.g.,the term “halogen”) are collective terms for the individual substituentsencompassed by the organic moiety. The prefix C_(n)-C_(m) preceding agroup or moiety indicates, in each case, the possible number of carbonatoms in the group or moiety that follows.

As used herein, the term “substituted” is contemplated to include allpermissible substituents of organic compounds. In a broad aspect, thepermissible substituents include acyclic and cyclic, branched andunbranched, carbocyclic and heterocyclic, and aromatic and nonaromaticsubstituents of organic compounds. Illustrative substituents include,for example, those described below. The permissible substituents can beone or more and the same or different for appropriate organic compounds.For purposes of this disclosure, heteroatoms present in a compound ormoiety, such as nitrogen, can have hydrogen substituents and/or anypermissible substituents of organic compounds described herein whichsatisfy the valency of the heteroatom. This disclosure is not intendedto be limited in any manner by the permissible substituents of organiccompounds. Also, the terms “substitution” or “substituted with” includethe implicit proviso that such substitution is in accordance withpermitted valence of the substituted atom and the substituent, and thatthe substitution results in a stable compound (e.g., a compound thatdoes not spontaneously undergo transformation such as by rearrangement,cyclization, elimination, etc.

“Z¹,” “Z²,” “Z³,” and “Z⁴” are used herein as generic symbols torepresent various specific substituents. These symbols can be anysubstituent, not limited to those disclosed herein, and when they aredefined to be certain substituents in one instance, they can, in anotherinstance, be defined as some other substituents.

As used herein, the term “alkyl” refers to saturated, straight-chainedor branched saturated hydrocarbon moieties. Unless otherwise specified,C₁-C₂₄ (e.g., C₁-C₂₂, C₁-C₂₀, C₁-C₁₈, C₁-C₁₆, C₁-C₁₄, C₁-C₁₂, C₁-C₁₀,C₁-C₈, C₁-C₆, or C₁-C₄) alkyl groups are intended. Examples of alkylgroups include methyl, ethyl, propyl, 1-methyl-ethyl, butyl,1-methyl-propyl, 2-methyl-propyl, 1,1-dimethyl-ethyl, pentyl,1-methyl-butyl, 2-methyl-butyl, 3-methyl-butyl, 2,2-dimethyl-propyl,1-ethyl-propyl, hexyl, 1,1-dimethyl-propyl, 1,2-dimethyl-propyl,1-methyl-pentyl, 2-methyl-pentyl, 3-methyl-pentyl, 4-methyl-pentyl,1,1-dimethyl-butyl, 1,2-dimethyl-butyl, 1,3-dimethyl-butyl,2,2-dimethyl-butyl, 2,3-dimethyl-butyl, 3,3-dimethyl-butyl,1-ethyl-butyl, 2-ethyl-butyl, 1,1,2-trimethyl-propyl,1,2,2-trimethyl-propyl, 1-ethyl-1-methyl-propyl, and1-ethyl-2-methyl-propyl. Alkyl substituents may be unsubstituted orsubstituted with one or more chemical moieties. The alkyl group can besubstituted with one or more groups including, but not limited to,hydroxy, halogen, acyl, alkyl, alkoxy, alkenyl, alkynyl, aryl,heteroaryl, acyl, aldehyde, amino, carboxylic acid, ester, ether,ketone, nitro, silyl, sulfo-oxo, sulfonyl, sulfone, sulfoxide, or thiol,as described below, provided that the substituents are stericallycompatible and the rules of chemical bonding and strain energy aresatisfied.

Throughout the specification “alkyl” is generally used to refer to bothunsubstituted alkyl groups and substituted alkyl groups; however,substituted alkyl groups are also specifically referred to herein byidentifying the specific substituent(s) on the alkyl group. For example,the term “halogenated alkyl” specifically refers to an alkyl group thatis substituted with one or more halides (halogens; e.g., fluorine,chlorine, bromine, or iodine). The term “alkoxyalkyl” specificallyrefers to an alkyl group that is substituted with one or more alkoxygroups, as described below. The term “alkylamino” specifically refers toan alkyl group that is substituted with one or more amino groups, asdescribed below, and the like. When “alkyl” is used in one instance anda specific term such as “alkylalcohol” is used in another, it is notmeant to imply that the term “alkyl” does not also refer to specificterms such as “alkylalcohol” and the like.

This practice is also used for other groups described herein. That is,while a term such as “cycloalkyl” refers to both unsubstituted andsubstituted cycloalkyl moieties, the substituted moieties can, inaddition, be specifically identified herein; for example, a particularsubstituted cycloalkyl can be referred to as, e.g., an“alkylcycloalkyl.” Similarly, a substituted alkoxy can be specificallyreferred to as, e.g., a “halogenated alkoxy,” a particular substitutedalkenyl can be, e.g., an “alkenylalcohol,” and the like. Again, thepractice of using a general term, such as “cycloalkyl,” and a specificterm, such as “alkylcycloalkyl,” is not meant to imply that the generalterm does not also include the specific term.

As used herein, the term “alkenyl” refers to unsaturated,straight-chained, or branched hydrocarbon moieties containing a doublebond. Unless otherwise specified, C₂-C₂₄ (e.g., C₂-C₂₂, C₂-C₂₀, C₂-C₁₈,C₂-C₁₆, C₂-C₁₄, C₂-C₁₂, C₂-C₁₀, C₂-C₈, C₂-C₆, C₂-C₄) alkenyl groups areintended. Alkenyl groups may contain more than one unsaturated bond.Examples include ethenyl, 1-propenyl, 2-propenyl, 1-methylethenyl,1-butenyl, 2-butenyl, 3-butenyl, 1-methyl-1-propenyl,2-methyl-1-propenyl, 1-methyl-2-propenyl, 2-methyl-2-propenyl,1-pentenyl, 2-pentenyl, 3-pentenyl, 4-pentenyl, 1-methyl-1-butenyl,2-methyl-1-butenyl, 3-methyl-1-butenyl, 1-methyl-2-butenyl,2-methyl-2-butenyl, 3-methyl-2-butenyl, 1-methyl-3-butenyl,2-methyl-3-butenyl, 3-methyl-3-butenyl, 1,1-dimethyl-2-propenyl,1,2-dimethyl-1-propenyl, 1,2-dimethyl-2-propenyl, 1-ethyl-1-propenyl,1-ethyl-2-propenyl, 1-hexenyl, 2-hexenyl, 3-hexenyl, 4-hexenyl,5-hexenyl, 1-methyl-1-pentenyl, 2-methyl-1-pentenyl,3-methyl-1-pentenyl, 4-methyl-1-pentenyl, 1-methyl-2-pentenyl,2-methyl-2-pentenyl, 3-methyl-2-pentenyl, 4-methyl-2-pentenyl,1-methyl-3-pentenyl, 2-methyl-3-pentenyl, 3-methyl-3-pentenyl,4-methyl-3-pentenyl, 1-methyl-4-pentenyl, 2-methyl-4-pentenyl,3-methyl-4-pentenyl, 4-methyl-4-pentenyl, 1,1-dimethyl-2-butenyl,1,1-dimethyl-3-butenyl, 1,2-dimethyl-1-butenyl, 1,2-dimethyl-2-butenyl,1,2-dimethyl-3-butenyl, 1,3-dimethyl-1-butenyl, 1,3-dimethyl-2-butenyl,1,3-dimethyl-3-butenyl, 2,2-dimethyl-3-butenyl, 2,3-dimethyl-1-butenyl,2,3-dimethyl-2-butenyl, 2,3-dimethyl-3-butenyl, 3,3-dimethyl-1-butenyl,3,3-dimethyl-2-butenyl, 1-ethyl-1-butenyl, 1-ethyl-2-butenyl,1-ethyl-3-butenyl, 2-ethyl-1-butenyl, 2-ethyl-2-butenyl,2-ethyl-3-butenyl, 1,1,2-trimethyl-2-propenyl,1-ethyl-1-methyl-2-propenyl, 1-ethyl-2-methyl-1-propenyl, and1-ethyl-2-methyl-2-propenyl. The term “vinyl” refers to a group havingthe structure —CH═CH₂; 1-propenyl refers to a group with thestructure-CH═CH—CH₃; and 2-propenyl refers to a group with the structure—CH₂—CH═CH₂. Asymmetric structures such as (Z¹Z²)C═C(Z³Z⁴) are intendedto include both the E and Z isomers. This can be presumed in structuralformulae herein wherein an asymmetric alkene is present, or it can beexplicitly indicated by the bond symbol C═C. Alkenyl substituents may beunsubstituted or substituted with one or more chemical moieties.Examples of suitable substituents include, for example, alkyl,halogenated alkyl, alkoxy, alkenyl, alkynyl, aryl, heteroaryl, acyl,aldehyde, amino, carboxylic acid, ester, ether, halide, hydroxy, ketone,nitro, silyl, sulfo-oxo, sulfonyl, sulfone, sulfoxide, or thiol, asdescribed below, provided that the substituents are stericallycompatible and the rules of chemical bonding and strain energy aresatisfied.

As used herein, the term “alkynyl” represents straight-chained orbranched hydrocarbon moieties containing a triple bond. Unless otherwisespecified, C₂-C₂₄ (e.g., C₂-C₂₂, C₂-C₂₀, C₂-C₁₈, C₂-C₁₆, C₂-C₁₄, C₂-C₁₂,C₂-C₁₀, C₂-C₈, C₂-C₆, C₂-C₄) alkynyl groups are intended. Alkynyl groupsmay contain more than one unsaturated bond. Examples includeC₂-C₆-alkynyl, such as ethynyl, 1-propynyl, 2-propynyl (or propargyl),1-butynyl, 2-butynyl, 3-butynyl, 1-methyl-2-propynyl, 1-pentynyl,2-pentynyl, 3-pentynyl, 4-pentynyl, 3-methyl-1-butynyl,1-methyl-2-butynyl, 1-methyl-3-butynyl, 2-methyl-3-butynyl,1,1-dimethyl-2-propynyl, 1-ethyl-2-propynyl, 1-hexynyl, 2-hexynyl,3-hexynyl, 4-hexynyl, 5-hexynyl, 3-methyl-1-pentynyl,4-methyl-1-pentynyl, 1-methyl-2-pentynyl, 4-methyl-2-pentynyl,1-methyl-3-pentynyl, 2-methyl-3-pentynyl, 1-methyl-4-pentynyl,2-methyl-4-pentynyl, 3-methyl-4-pentynyl, 1,1-dimethyl-2-butynyl,1,1-dimethyl-3-butynyl, 1,2-dimethyl-3-butynyl, 2,2-dimethyl-3-butynyl,3,3-dimethyl-1-butynyl, 1-ethyl-2-butynyl, 1-ethyl-3-butynyl,2-ethyl-3-butynyl, and 1-ethyl-1-methyl-2-propynyl. Alkynyl substituentsmay be unsubstituted or substituted with one or more chemical moieties.Examples of suitable substituents include, for example, alkyl,halogenated alkyl, alkoxy, alkenyl, alkynyl, aryl, heteroaryl, acyl,aldehyde, amino, carboxylic acid, ester, ether, halide, hydroxy, ketone,nitro, silyl, sulfo-oxo, sulfonyl, sulfone, sulfoxide, or thiol, asdescribed below.

As used herein, the term “aryl,” as well as derivative terms such asaryloxy, refers to groups that include a monovalent aromatic carbocyclicgroup of from 3 to 20 carbon atoms. Aryl groups can include a singlering or multiple condensed rings. In some embodiments, aryl groupsinclude C₆-C₁₀ aryl groups. Examples of aryl groups include, but are notlimited to, phenyl, biphenyl, naphthyl, tetrahydronaphthyl,phenylcyclopropyl, and indanyl. In some embodiments, the aryl group canbe a phenyl, indanyl or naphthyl group. The term “heteroaryl” is definedas a group that contains an aromatic group that has at least oneheteroatom incorporated within the ring of the aromatic group. Examplesof heteroatoms include, but are not limited to, nitrogen, oxygen,sulfur, and phosphorus. The term “non-heteroaryl,” which is included inthe term “aryl,” defines a group that contains an aromatic group thatdoes not contain a heteroatom. The aryl or heteroaryl substituents maybe unsubstituted or substituted with one or more chemical moieties.Examples of suitable substituents include, for example, alkyl,halogenated alkyl, alkoxy, alkenyl, alkynyl, aryl, heteroaryl, acyl,aldehyde, amino, carboxylic acid, cycloalkyl, ester, ether, halide,hydroxy, ketone, nitro, silyl, sulfo-oxo, sulfonyl, sulfone, sulfoxide,or thiol as described herein. The term “biaryl” is a specific type ofaryl group and is included in the definition of aryl. Biaryl refers totwo aryl groups that are bound together via a fused ring structure, asin naphthalene, or are attached via one or more carbon-carbon bonds, asin biphenyl.

The term “cycloalkyl” as used herein is a non-aromatic carbon-based ringcomposed of at least three carbon atoms. Examples of cycloalkyl groupsinclude, but are not limited to, cyclopropyl, cyclobutyl, cyclopentyl,cyclohexyl, etc. The term “heterocycloalkyl” is a cycloalkyl group asdefined above where at least one of the carbon atoms of the ring issubstituted with a heteroatom such as, but not limited to, nitrogen,oxygen, sulfur, or phosphorus. The cycloalkyl group and heterocycloalkylgroup can be substituted or unsubstituted. The cycloalkyl group andheterocycloalkyl group can be substituted with one or more groupsincluding, but not limited to, alkyl, alkoxy, alkenyl, alkynyl, aryl,heteroaryl, acyl, aldehyde, amino, carboxylic acid, ester, ether,halide, hydroxy, ketone, nitro, silyl, sulfo-oxo, sulfonyl, sulfone,sulfoxide, or thiol as described herein.

The term “cycloalkenyl” as used herein is a non-aromatic carbon-basedring composed of at least three carbon atoms and containing at least onedouble bound, i.e., C═C. Examples of cycloalkenyl groups include, butare not limited to, cyclopropenyl, cyclobutenyl, cyclopentenyl,cyclopentadienyl, cyclohexenyl, cyclohexadienyl, and the like. The term“heterocycloalkenyl” is a type of cycloalkenyl group as defined above,and is included within the meaning of the term “cycloalkenyl,” where atleast one of the carbon atoms of the ring is substituted with aheteroatom such as, but not limited to, nitrogen, oxygen, sulfur, orphosphorus. The cycloalkenyl group and heterocycloalkenyl group can besubstituted or unsubstituted. The cycloalkenyl group andheterocycloalkenyl group can be substituted with one or more groupsincluding, but not limited to, alkyl, alkoxy, alkenyl, alkynyl, aryl,heteroaryl, acyl, aldehyde, amino, carboxylic acid, ester, ether,halide, hydroxy, ketone, nitro, silyl, sulfo-oxo, sulfonyl, sulfone,sulfoxide, or thiol as described herein.

The term “cyclic group” is used herein to refer to either aryl groups,non-aryl groups (i.e., cycloalkyl, heterocycloalkyl, cycloalkenyl, andheterocycloalkenyl groups), or both. Cyclic groups have one or more ringsystems that can be substituted or unsubstituted. A cyclic group cancontain one or more aryl groups, one or more non-aryl groups, or one ormore aryl groups and one or more non-aryl groups.

The term “acyl” as used herein is represented by the formula —C(O)Z¹where Z¹ can be a hydrogen, hydroxyl, alkoxy, alkyl, halogenated alkyl,alkenyl, alkynyl, aryl, heteroaryl, cycloalkyl, cycloalkenyl,heterocycloalkyl, or heterocycloalkenyl group described above. As usedherein, the term “acyl” can be used interchangeably with “carbonyl.”Throughout this specification “C(O)” or “CO” is a short hand notationfor C═O.

As used herein, the term “alkoxy” refers to a group of the formulaZ¹—O—, where Z¹ is unsubstituted or substituted alkyl as defined above.Unless otherwise specified, alkoxy groups wherein Z¹ is a C₁-C₂₄ (e.g.,C₁-C₂₂, C₁-C₂₀, C₁-C₁₈, C₁-C₁₆, C₁-C₁₄, C₁-C₁₂, C₁-C₁₀, C₁-C₈, C₁-C₆,C₁-C₄) alkyl group are intended. Examples include methoxy, ethoxy,propoxy, 1-methyl-ethoxy, butoxy, 1-methyl-propoxy, 2-methyl-propoxy,1,1-dimethyl-ethoxy, pentoxy, 1-methyl-butyloxy, 2-methyl-butoxy,3-methyl-butoxy, 2,2-di-methyl-propoxy, 1-ethyl-propoxy, hexoxy,1,1-dimethyl-propoxy, 1,2-dimethyl-propoxy, 1-methyl-pentoxy,2-methyl-pentoxy, 3-methyl-pentoxy, 4-methyl-penoxy,1,1-dimethyl-butoxy, 1,2-dimethyl-butoxy, 1,3-dimethyl-butoxy,2,2-dimethyl-butoxy, 2,3-dimethyl-butoxy, 3,3-dimethyl-butoxy,1-ethyl-butoxy, 2-ethylbutoxy, 1,1,2-trimethyl-propoxy,1,2,2-trimethyl-propoxy, 1-ethyl-1-methyl-propoxy, and1-ethyl-2-methyl-propoxy.

The term “aldehyde” as used herein is represented by the formula —C(O)H.

The terms “amine” or “amino” as used herein are represented by theformula —NZ¹Z², where Z¹ and Z² can each be substitution group asdescribed herein, such as hydrogen, an alkyl, halogenated alkyl,alkenyl, alkynyl, aryl, heteroaryl, cycloalkyl, cycloalkenyl,heterocycloalkyl, or heterocycloalkenyl group described above. “Amido”is —C(O)NZ¹Z².

The term “carboxylic acid” as used herein is represented by the formula—C(O)OH. A “carboxylate” or “carboxyl” group as used herein isrepresented by the formula —C(O)O⁻.

The term “ester” as used herein is represented by the formula —OC(O)Z¹or —C(O)OZ¹, where Z¹ can be an alkyl, halogenated alkyl, alkenyl,alkynyl, aryl, heteroaryl, cycloalkyl, cycloalkenyl, heterocycloalkyl,or heterocycloalkenyl group described above.

The term “ether” as used herein is represented by the formula Z¹OZ²,where Z¹ and Z² can be, independently, an alkyl, halogenated alkyl,alkenyl, alkynyl, aryl, heteroaryl, cycloalkyl, cycloalkenyl,heterocycloalkyl, or heterocycloalkenyl group described above.

The term “ketone” as used herein is represented by the formula Z¹C(O)Z²,where Z¹ and Z² can be, independently, an alkyl, halogenated alkyl,alkenyl, alkynyl, aryl, heteroaryl, cycloalkyl, cycloalkenyl,heterocycloalkyl, or heterocycloalkenyl group described above.

The term “halide” or “halogen” or “halo” as used herein refers tofluorine, chlorine, bromine, and iodine.

The term “hydroxyl” as used herein is represented by the formula —OH.

The term “nitro” as used herein is represented by the formula —NO₂.

The term “silyl” as used herein is represented by the formula —SiZ¹Z²Z³,where Z¹, Z², and Z³ can be, independently, hydrogen, alkyl, halogenatedalkyl, alkoxy, alkenyl, alkynyl, aryl, heteroaryl, cycloalkyl,cycloalkenyl, heterocycloalkyl, or heterocycloalkenyl group describedabove.

The term “sulfonyl” is used herein to refer to the sulfo-oxo grouprepresented by the formula —S(O)₂Z¹, where Z¹ can be hydrogen, an alkyl,halogenated alkyl, alkenyl, alkynyl, aryl, heteroaryl, cycloalkyl,cycloalkenyl, heterocycloalkyl, or heterocycloalkenyl group describedabove.

The term “sulfonylamino” or “sulfonamide” as used herein is representedby the formula —S(O)₂NH—.

The term “thiol” as used herein is represented by the formula —SH—.

The term “thio” as used herein is represented by the formula —S—.

As used herein, Me refers to a methyl group; OMe refers to a methoxygroup; and i-Pr refers to an isopropyl group.

“R¹,” “R²,” “R³,” “R^(n),” etc., where n is some integer, as used hereincan, independently, possess one or more of the groups listed above. Forexample, if R¹ is a straight chain alkyl group, one of the hydrogenatoms of the alkyl group can optionally be substituted with a hydroxylgroup, an alkoxy group, an amine group, an alkyl group, a halide, andthe like. Depending upon the groups that are selected, a first group canbe incorporated within second group or, alternatively, the first groupcan be pendant (i.e., attached) to the second group. For example, withthe phrase “an alkyl group comprising an amino group,” the amino groupcan be incorporated within the backbone of the alkyl group.Alternatively, the amino group can be attached to the backbone of thealkyl group. The nature of the group(s) that is (are) selected willdetermine if the first group is embedded or attached to the secondgroup.

Unless stated to the contrary, a formula with chemical bonds shown onlyas solid lines and not as wedges or dashed lines contemplates eachpossible stereoisomer or mixture of stereoisomer (e.g., each enantiomer,each diastereomer, each meso compound, a racemic mixture, or scalemicmixture).

Reference will now be made in detail to specific aspects of thedisclosed materials, compounds, compositions, articles, and methods,examples of which are illustrated in the accompanying Examples andFigures.

Compounds

Disclosed herein are compounds comprising dicarba-closo-dodecaborane.Dicarba-closo-dodecaborane (also referred to herein as “carborane”) isan icosahedral cluster containing two carbon atoms and ten boron atomsin which both atoms are hexacoordinated. In carboranes, depending on theposition of the carbon atoms in the cluster, 3 kinds of isomers exist,i.e., 1,2-dicarba-closo-dodecaborane (ortho-carborane),1,7-dicarba-closo-dodecaborane (meta-carborane), and1,12-dicarba-closo-dodecaborane (para-carborane). These structures areunique among boron compounds, as they can have high thermal stabilitiesand hydrophobicities, for example, comparable to hydrocarbons.

Carboranes can be used, for example, in ¹⁰Boron-Neutron Capture Therapy(BNCT). BNCT has been developed as a therapy for glioma and melanoma.When ¹⁰B is irradiated with thermal neutron (slow neutron), and a raywith 2.4 MeV energy is emitted and the atom decomposed to ⁷Li and ⁴He.The range of α ray is about 10 μm, which corresponds to the diameter ofcells Therefore, effects are expected that only cells in which ¹⁰B atomsare uptaken are destroyed and other cells are not damaged. For thedevelopment of BNCT, it is important to have cancer cells selectivelyuptake ¹⁰B atoms in a concentration capable of destroying cells withneutron radiation. For that purpose, other-carborane skeleton has beenutilized which has been utilized which has low toxicity and a high ¹⁰Bcontent, and is easy to be synthesized. Moreover, nucleic acidprecursors, amino acids, and porphyrins which contain ortho-carboraneshave been synthesized and subjected to evaluation.

Disclosed herein are compounds of Formula I, and pharmaceuticallyacceptable salts thereof:

wherein

Q is a substituted or unsubstituted dicarba-closo-dodecaborane cluster,and

and R¹ are attached to Q in a para configuration;

X is OH, NHR², SH, or S(O)(O)NHR²;

R¹ is substituted or unsubstituted C₄-C₂₀ alkyl, substituted orunsubstituted C₂-C₂₀ alkenyl, substituted or unsubstituted C₂-C₂₀alkynyl, substituted or unsubstituted C₃-C₂₀ alkylaryl, substituted orunsubstituted C₄-C₂₀ alkylcycloalkyl, substituted or unsubstitutedC₁-C₂₀ acyl, or NR³R⁴;

R² is H, OH, halogen, or substituted or unsubstituted C₁-C₄ alkyl;

R³ and R⁴ are independently selected from substituted or unsubstitutedC₁-C₂₀ alkyl, substituted or unsubstituted C₂-C₂₀ alkenyl, substitutedor unsubstituted C₂-C₂₀ alkynyl, substituted or unsubstituted C₂-C₂₀alkylaryl, substituted or unsubstituted C₄-C₂₀ alkylcycloalkyl, orsubstituted or unsubstituted C₁-C₂₀ acyl;

with the proviso that when X is OH, R¹ is not (CH₂)₅CH(CH₃)₂ or NH₂.

In some examples of Formula I, the carborane cluster can include aheteroatom. In some examples of Formula I, the carborane cluster caninclude an isotopically labeled atom (i.e., a radiolabeled atom). Insome examples of Formula I, the carborane cluster can include anisotopically labeled Boron atom (e.g., ¹⁰B).

In some examples of Formula I, Q can be:

wherein

• is a carbon atom or a boron atom; and

∘ is C—H, C-halogen, C-alkyl, C—OH, C—NH₂, B—H, B-halogen, B-alkyl,B—OH, or B—NH₂.

In some examples of Formula I, X is OH.

In some examples of Formula I, R¹ is a substituted or unsubstitutedC₆-C₁₀ alkyl. In some examples of Formula I, R¹ is a C₆-C₁₀hydroxyalkyl. In some examples of Formula I, R¹ is a substituted orunsubstituted C₃-C₁₆ alkylaryl. In some examples of Formula I, R¹ is aC₃-C₁₆ hydroxyalkylaryl. In some examples of Formula I, R¹ is asubstituted or unsubstituted C₅-C₁₀ acyl. In some examples of Formula I,R¹ is a substituted or unsubstituted branched C₄-C₁₀ alkyl. In someexamples of Formula I, R¹ is a branched C₄-C₁₀ hydroxyalkyl.

In some examples of Formula I, the compounds can be of Formula II, or apharmaceutically acceptable salt thereof:

wherein

• is a carbon atom;

∘ is B—H, B-halogen, B-alkyl, B—OH, or B—NH₂;

X is OH, NHR², SH, or S(O)(O)NHR²;

R¹ is substituted or unsubstituted C₄-C₂₀ alkyl, substituted orunsubstituted C₂-C₂₀ alkenyl, substituted or unsubstituted C₂-C₂₀alkynyl, substituted or unsubstituted C₃-C₂₀ alkylaryl, substituted orunsubstituted C₄-C₂₀ alkylcycloalkyl, substituted or unsubstitutedC₁-C₂₀ acyl, or NR³R⁴;

R² is H, OH, halogen, or substituted or unsubstituted C₁-C₄ alkyl; and

R³ and R⁴ are independently selected from substituted or unsubstitutedC₁-C₂₀ alkyl, substituted or unsubstituted C₂-C₂₀ alkenyl, substitutedor unsubstituted C₂-C₂₀ alkynyl, substituted or unsubstituted C₂-C₂₀alkylaryl, substituted or unsubstituted C₄-C₂₀ alkylcycloalkyl, orsubstituted or unsubstituted C₁-C₂₀ acyl;

with the proviso that when X is OH, R¹ is not (CH₂)₅CH(CH₃)₂ or NH₂.

In some examples of Formula II, the carborane cluster can include aheteroatom.

In some examples of Formula II, the carborane cluster can include anisotopically labeled atom (i.e., a radiolabeled atom). In some examplesof Formula II, the carborane cluster can include an isotopically labeledBoron atom (e.g., ¹⁰B).

In some examples of Formula II, X is OH.

In some examples of Formula II, R¹ is a substituted or unsubstitutedC₆-C₁₀ alkyl. In some examples of Formula II, R¹ is a C₆-C₁₀hydroxyalkyl. In some examples of Formula II, R¹ is a substituted orunsubstituted C₃-C₁₆ alkylaryl. In some examples of Formula II, R¹ is aC₃-C₁₆ hydroxyalkylaryl. In some examples of Formula II, R¹ is asubstituted or unsubstituted C₅-C₁₀ acyl. In some examples of FormulaII, R¹ is a substituted or unsubstituted branched C₄-C₁₀ alkyl. In someexamples of Formula II, R¹ is a branched C₄-C₁₀ hydroxyalkyl.

In some examples of Formula II, the compounds can be of Formula III, ora pharmaceutically acceptable salt thereof:

wherein

• is a carbon atom;

∘ is B—H, B-halogen, B-alkyl, B—OH, or B—NH₂;

the dotted line to Y indicates that the bond can be a single bond or adouble bond, as valence permits;

X is OH, NHR², SH, or S(O)(O)NHR²;

Y is O, OR^(2′), NHR², SH, or S(O)(O)NHR²;

R⁵ is substituted or unsubstituted C₂-C₁₉ alkyl, substituted orunsubstituted C₂-C₁₉ alkenyl, substituted or unsubstituted C₂-C₁₉alkynyl, substituted or unsubstituted C₂-C₁₉ alkylaryl, or substitutedor unsubstituted C₃-C₁₉ alkylcycloalkyl, or NR³R⁴;

R² is H, OH, halogen, or substituted or unsubstituted C₁-C₄ alkyl;

R^(2′) is H or substituted or unsubstituted C₁-C₄ alkyl; and

R³ and R⁴ are independently selected from substituted or unsubstitutedC₁-C₂₀ alkyl, substituted or unsubstituted C₂-C₂₀ alkenyl, substitutedor unsubstituted C₂-C₂₀ alkynyl, substituted or unsubstituted C₂-C₂₀alkylaryl, substituted or unsubstituted C₄-C₂₀ alkylcycloalkyl, orsubstituted or unsubstituted C₁-C₂₀ acyl.

In some examples of Formula III, the carborane cluster can include aheteroatom. In some examples of Formula III, the carborane cluster caninclude an isotopically labeled atom (i.e., a radiolabeled atom). Insome examples of Formula III, the carborane cluster can include anisotopically labeled Boron atom (e.g., ¹⁰B).

In some examples of Formula III, X is OH.

In some examples of Formula III, Y is OH. In some examples of FormulaIII, Y is O.

In some examples of Formula III, R⁵ is a substituted or unsubstitutedC₃-C₉ alkyl. In some examples of Formula III, R⁵ is a substituted orunsubstituted C₆-C₉ alkyl. In some examples of Formula III, R⁵ is asubstituted or unsubstituted C₂-C₁₅ alkylaryl. In some examples ofFormula III, R⁵ is a substituted or unsubstituted branched C₂-C₉ alkyl.

Also disclosed herein are compounds of Formula IV, and pharmaceuticallyacceptable salts thereof:

wherein

Q is a substituted or unsubstituted dicarba-closo-dodecaborane cluster,and

are attached to Q in a para configuration;

the dotted line to Y indicates that the bond can be a single bond or adouble bond, as valence permits;

X is OH, NHR², SH, or S(O)(O)NHR²;

Y is O, OR^(2′), NHR², SH, or S(O)(O)NHR²;

R⁶ is substituted or unsubstituted C₁-C₂₀ alkyl, substituted orunsubstituted C₂-C₂₀ alkenyl, substituted or unsubstituted C₂-C₂₀alkynyl, substituted or unsubstituted C₂-C₂₀ alkylaryl, or substitutedor unsubstituted C₄-C₂₀ alkylcycloalkyl, or NR³R⁴;

R² is H, OH, halogen, or substituted or unsubstituted C₁-C₄ alkyl;

R^(2′) is H or substituted or unsubstituted C₁-C₄ alkyl; and

R³ and R⁴ are independently selected from substituted or unsubstitutedC₁-C₂₀ alkyl, substituted or unsubstituted C₂-C₂₀ alkenyl, substitutedor unsubstituted C₂-C₂₀ alkynyl, substituted or unsubstituted C₂-C₂₀alkylaryl, substituted or unsubstituted C₄-C₂₀ alkylcycloalkyl, orsubstituted or unsubstituted C₁-C₂₀ acyl;

with the proviso that when X is OH, R⁶ is not CH₂OH, CH(CH₃)OH,CH₂CH₂OH, CH₂CH₂CH₂OH, (CH₂)₅CH(CH₃)₂, or NH₂.

In some examples of Formula IV, the carborane cluster can include aheteroatom. In some examples of Formula IV, the carborane cluster caninclude an isotopically labeled atom (i.e., a radiolabeled atom). Insome examples of Formula IV, the carborane cluster can include anisotopically labeled Boron atom (e.g., ¹⁰B).

In some examples of Formula IV, Q can be

wherein

• is a carbon atom or a boron atom; and

∘ is C—H, C-halogen, C-alkyl, C—OH, C—NH₂, B—H, B-halogen, B-alkyl,B—OH, or B—NH₂.

In some examples of Formula IV, X is OH.

In some examples of Formula IV, Y is OH. In some examples of Formula IV,Y is O.

In some examples of Formula IV, R⁶ is a substituted or unsubstitutedC₆-C₁₀ alkyl. In some examples of Formula IV, R⁶ is a substituted orunsubstituted C₂-C₁₅ alkylaryl. In some examples of Formula IV, R⁶ is asubstituted or unsubstituted branched C₃-C₁₀ alkyl.

In some examples of Formula IV, the compounds can be of Formula V, or apharmaceutically acceptable salt thereof:

wherein

• is a carbon atom;

∘ is B—H, B-halogen, B-alkyl, B—OH, or B—NH₂;

the dotted line to Y indicates that the bond can be a single bond or adouble bond, as valence permits;

X is OH, NHR², SH, or S(O)(O)NHR²;

Y is O, OR^(2′), NHR², SH, or S(O)(O)NHR²;

R⁶ is substituted or unsubstituted C₁-C₂₀ alkyl, substituted orunsubstituted C₂-C₂₀ alkenyl, substituted or unsubstituted C₂-C₂₀alkynyl, substituted or unsubstituted C₂-C₂₀ alkylaryl, or substitutedor unsubstituted C₄-C₂₀ alkylcycloalkyl, or NR³R⁴;

R² is H, OH, halogen, or substituted or unsubstituted C₁-C₄ alkyl;

R^(2′) is H or substituted or unsubstituted C₁-C₄ alkyl; and

R³ and R⁴ are independently selected from substituted or unsubstitutedC₁-C₂₀ alkyl, substituted or unsubstituted C₂-C₂₀ alkenyl, substitutedor unsubstituted C₂-C₂₀ alkynyl, substituted or unsubstituted C₂-C₂₀alkylaryl, substituted or unsubstituted C₄-C₂₀ alkylcycloalkyl, orsubstituted or unsubstituted C₁-C₂₀ acyl;

with the proviso that when X is OH, R⁶ is not CH₂OH, CH(CH₃)OH,CH₂CH₂OH, CH₂CH₂CH₂OH, (CH₂)₅CH(CH₃)₂, or NH₂.

In some examples of Formula V, the carborane cluster can include aheteroatom. In some examples of Formula V, the carborane cluster caninclude an isotopically labeled atom (i.e., a radiolabeled atom). Insome examples of Formula V, the carborane cluster can include anisotopically labeled Boron atom (e.g., ¹⁰B).

In some examples of Formula V, X is OH.

In some examples of Formula V, Y is OH. In some examples of Formula V, Yis O.

In some examples of Formula V, R⁶ is a substituted or unsubstitutedC₆-C₁₀ alkyl. In some examples of Formula V, R⁶ is a substituted orunsubstituted C₂-C₁₅ alkylaryl. In some examples of Formula V, R⁶ is asubstituted or unsubstituted branched C₃-C₁₀ alkyl.

Also disclosed herein are compounds of Formula VI, and pharmaceuticallyacceptable salts thereof:

wherein

Q is a substituted or unsubstituted dicarba-closo-dodecaborane cluster,and

and R¹ are attached to Q in a para configuration;

X is OH, NHR², SH, or S(O)(O)NHR²;

R⁷ is substituted or unsubstituted C₁-C₁₄ alkyl, substituted orunsubstituted C₂-C₁₄ alkenyl, substituted or unsubstituted C₂-C₁₄alkynyl, substituted or unsubstituted C₁-C₁₄ acyl, or NR³R⁴;

R⁸, R⁹, R¹⁰, R¹¹, and R¹² are independently H, OH, halogen, substitutedor unsubstituted C₁-C₂₀ alkyl, sub substituted or unsubstituted C₂-C₂₀alkenyl, substituted or unsubstituted C₂-C₂₀ alkynyl, substituted orunsubstituted C₂-C₂₀ alkylaryl, substituted or unsubstituted C₄-C₂₀alkylcycloalkyl, substituted or unsubstituted C₁-C₂₀ acyl, or NR³R⁴, orwherein, as valence permits, R⁸ and R⁹, R⁹ and R¹⁰, R¹⁰ and R¹¹, or R¹¹and R¹², together with the atoms to which they are attached, form a 3-10membered substituted or unsubstituted cyclic moiety optionally includingfrom 1 to 3 heteroatoms;

R² is H, OH, halogen, or substituted or unsubstituted C₁-C₄ alkyl; and

R³ and R⁴ are independently selected from substituted or unsubstitutedC₁-C₂₀ alkyl, substituted or unsubstituted C₂-C₂₀ alkenyl, substitutedor unsubstituted C₂-C₂₀ alkynyl, substituted or unsubstituted C₂-C₂₀alkylaryl, substituted or unsubstituted C₄-C₂₀ alkylcycloalkyl, orsubstituted or unsubstituted C₁-C₂₀ acyl.

In some examples of Formula VI, the carborane cluster can include aheteroatom. In some examples of Formula VI, the carborane cluster caninclude an isotopically labeled atom (i.e., a radio labeled atom). Insome examples of Formula VI, the carborane cluster can include anisotopically labeled Boron atom (e.g., ¹⁰B).

In some examples of Formula VI, Q can be

wherein

• is a carbon atom or a boron atom; and

∘ is C—H, C-halogen, C-alkyl, C—OH, C—NH₂, B—H, B-halogen, B-alkyl,B—OH, or B—NH₂.

In some examples of Formula VI, X is OH.

In some examples of Formula VI, R⁷ is a substituted or unsubstitutedC₁-C₇ alkyl. In some examples of Formula VI, R⁷ is a C₁-C₇ hydroxyalkyl.

In some examples of Formula VI, R⁸-R¹² are independently H, OH, halogen,or substituted or unsubstituted C₁-C₄ alkyl, or wherein, as valencepermits, R⁸ and R⁹, R⁹ and R¹⁰, R¹⁰ and R¹¹, or R¹¹ and R¹², togetherwith the atoms to which they are attached, form a 3-10 memberedsubstituted or unsubstituted cyclic moiety optionally including from 1to 3 heteroatoms. In some examples of Formula VI, R⁸-R¹² are each H. Insome examples of Formula VI, R⁸, R¹⁰, and R¹² are each H, and R⁹ andR¹⁰, together with the atoms to which they are attached, form asubstituted or unsubstituted 5-7 membered cyclic moiety.

In some examples of Formula VI, the compounds can be of Formula VII, ora pharmaceutically acceptable salt thereof:

wherein

• is a carbon atom;

∘ is B—H, B-halogen, B-alkyl, B—OH, or B—NH₂;

X is OH, NHR², SH, or S(O)(O)NHR²;

R⁷ is substituted or unsubstituted C₁-C₁₄ alkyl, substituted orunsubstituted C₂-C₁₄ alkenyl, substituted or unsubstituted C₂-C₁₄alkynyl, substituted or unsubstituted C₁-C₁₄ acyl, or NR³R⁴;

R⁸, R⁹, R¹⁰, R¹¹, and R¹² are independently H, OH, halogen, substitutedor unsubstituted C₁-C₂₀ alkyl, sub substituted or unsubstituted C₂-C₂₀alkenyl, substituted or unsubstituted C₂-C₂₀ alkynyl, substituted orunsubstituted C₂-C₂₀ alkylaryl, substituted or unsubstituted C₄-C₂₀alkylcycloalkyl, substituted or unsubstituted C₁-C₂₀ acyl, or NR³R⁴, orwherein, as valence permits, R⁸ and R⁹, R⁹ and R¹⁰, R¹⁰ and R¹¹, or R¹¹and R¹², together with the atoms to which they are attached, form a 3-10membered substituted or unsubstituted cyclic moiety optionally includingfrom 1 to 3 heteroatoms;

R² is H, OH, halogen, or substituted or unsubstituted C₁-C₄ alkyl; and

R³ and R⁴ are independently selected from substituted or unsubstitutedC₁-C₂₀ alkyl, substituted or unsubstituted C₂-C₂₀ alkenyl, substitutedor unsubstituted C₂-C₂₀ alkynyl, substituted or unsubstituted C₂-C₂₀alkylaryl, substituted or unsubstituted C₄-C₂₀ alkylcycloalkyl, orsubstituted or unsubstituted C₁-C₂₀ acyl.

In some examples of Formula VII, the carborane cluster can include aheteroatom. In some examples of Formula VII, the carborane cluster caninclude an isotopically labeled atom (i.e., a radiolabeled atom). Insome examples of Formula VII, the carborane cluster can include anisotopically labeled Boron atom (e.g., ¹⁰B).

In some examples of Formula VII, X is OH.

In some examples of Formula VII, R⁷ is a substituted or unsubstitutedC₁-C₇ alkyl. In some examples of Formula VII, R⁷ is a C₁-C₇hydroxyalkyl.

In some examples of Formula VII, R⁸-R¹² are independently H, OH,halogen, or substituted or unsubstituted C₁-C₄ alkyl, or wherein, asvalence permits, R⁸ and R⁹, R⁹ and R¹⁰, R¹⁰ and R¹¹, or R¹¹ and R¹²,together with the atoms to which they are attached, form a 3-10 memberedsubstituted or unsubstituted cyclic moiety optionally including from 1to 3 heteroatoms. In some examples of Formula VII, R⁸-R¹² are each H. Insome examples of Formula VII, R⁸, R¹⁰, and R¹² are each H, and R⁹ andR¹⁰, together with the atoms to which they are attached, form asubstituted or unsubstituted 5-7 membered cyclic moiety.

Also disclosed herein are compounds of Formula VIII, andpharmaceutically acceptable salts thereof:

wherein

Q is a substituted or unsubstituted dicarba-closo-dodecaborane cluster,and

and R¹³ are attached to Q in a para configuration;

X is OH, NHR², SH, or S(O)(O)NHR²;

R¹³ is substituted or unsubstituted C₁-C₁₉ alkyl, substituted orunsubstituted C₂-C₁₉ alkenyl, substituted or unsubstituted C₂-C₁₉alkynyl, or substituted or unsubstituted C₁-C₂₀ acyl; and

R¹⁴, R¹⁵, and R¹⁶ are independently hydrogen, halogen, hydroxyl,substituted or unsubstituted C₁-C₁₈ alkyl, substituted or unsubstitutedC₂-C₁₈ alkenyl, substituted or unsubstituted C₁-C₁₈ alkynyl, substitutedor unsubstituted C₂-C₁₈ aryl, substituted or unsubstituted C₃-C₁₈cycloalkyl, substituted or unsubstituted C₁-C₂₀ acyl, or NR³R⁴, orwherein, as valence permits, R¹⁴ and R¹⁵, R¹⁴ and R¹⁶, or R¹⁵ and R¹⁶,together with the atoms to which they are attached, for a 3-10 memberedsubstituted or unsubstituted cyclic moiety optionally including from 1to 3 heteroatoms,

with the proviso that at least two of R¹⁴, R¹⁵ and R¹⁶ are not hydrogen,halogen, or hydroxyl; and

with the proviso that when X is OH and R¹³ is a C₅ alkyl, R¹⁴, R¹⁵, andR¹⁶ are not H, methyl, and methyl.

In some examples of Formula VIII, the carborane cluster can include aheteroatom. In some examples of Formula VIII, the carborane cluster caninclude an isotopically labeled atom (i.e., a radio labeled atom). Insome examples of Formula VIII, the carborane cluster can include anisotopically labeled Boron atom (e.g., ¹⁰B). In some examples of FormulaVIII, Q is

wherein

• is a carbon atom or a boron atom; and

∘ is C—H, C-halogen, C-alkyl, C—OH, C—NH₂, B—H, B-halogen, B-alkyl,B—OH, or B—NH₂.

In some examples of Formula VIII, X is OH.

In some examples of Formula VIII, R¹³ is a substituted or unsubstitutedC₄-C₈ alkyl. In some examples of Formula VIII, R¹³ is a C₄-C₈hydroxyalkyl.

In some examples of Formula VIII, R¹⁴-R¹⁶ are independently hydrogen,halogen, hydroxyl, substituted or unsubstituted C₁-C₄ alkyl, with theproviso that at least two of R¹⁴, R¹⁵ and R¹⁶ are not hydrogen, halogen,or hydroxyl; and with the proviso that when X is OH and R¹³ is a C₅alkyl, R¹⁴, R¹⁵, and R¹⁶ are not H, methyl, and methyl.

In some examples of Formula VIII, the compounds can be of Formula IX, ora pharmaceutically acceptable salt thereof:

wherein

• is a carbon atom;

∘ is B—H, B-halogen, B-alkyl, B—OH, or B—NH₂;

X is OH, NHR², SH, or S(O)(O)NHR²;

R¹³ is substituted or unsubstituted C₁-C₁₉ alkyl, substituted orunsubstituted C₂-C₁₉ alkenyl, substituted or unsubstituted C₂-C₁₉alkynyl, or substituted or unsubstituted C₁-C₂₀ acyl; and

R¹⁴, R¹⁵, and R¹⁶ are independently hydrogen, halogen, hydroxyl,substituted or unsubstituted C₁-C₁₈ alkyl, substituted or unsubstitutedC₂-C₁₈ alkenyl, substituted or unsubstituted C₁-C₁₈ alkynyl, substitutedor unsubstituted C₂-C₁₈ aryl, substituted or unsubstituted C₃-C₁₈cycloalkyl, substituted or unsubstituted C₁-C₂₀ acyl, or NR³R⁴, orwherein, as valence permits, R¹⁴ and R¹⁵, R¹⁴ and R¹⁶, or R¹⁵ and R¹⁶,together with the atoms to which they are attached, for a 3-10 memberedsubstituted or unsubstituted cyclic moiety optionally including from 1to 3 heteroatoms,

with the proviso that at least two of R¹⁴, R¹⁵ and R¹⁶ are not hydrogen,halogen, or hydroxyl; and

with the proviso that when X is OH and R¹³ is a C₅ alkyl, R¹⁴, R¹⁵, andR¹⁶ are not H, methyl, and methyl.

In some examples of Formula IX, the carborane cluster can include aheteroatom. In some examples of Formula IX, the carborane cluster caninclude an isotopically labeled atom (i.e., a radio labeled atom). Insome examples of Formula IX, the carborane cluster can include anisotopically labeled Boron atom (e.g., ¹⁰B).

In some examples of Formula IX, X is OH.

In some examples of Formula IX, R¹³ is a substituted or unsubstitutedC₄-C₈ alkyl. In some examples of Formula IX, R¹³ is a C₄-C₈hydroxyalkyl.

In some examples of Formula IX, R¹⁴-R¹⁶ are independently hydrogen,halogen, hydroxyl, substituted or unsubstituted C₁-C₄ alkyl, with theproviso that at least two of R¹⁴, R¹⁵ and R¹⁶ are not hydrogen, halogen,or hydroxyl; and with the proviso that when X is OH and R¹³ is a C₅alkyl, R¹⁴, R¹⁵, and R¹⁶ are not H, methyl, and methyl.

In some examples, the compounds can be selected from the groupconsisting of:

and pharmaceutically acceptable salts thereof. In some examples, thecarborane cluster can include a heteroatom. In some examples, thecarborane cluster can include an isotopically labeled atom (i.e., aradiolabeled atom). In some examples, the carborane cluster can includean isotopically labeled Boron atom (e.g., ¹⁰B).

In some examples, the compounds disclosed herein can have an EC₅₀ of 800nM or less at estrogen receptor beta (ERβ) (e.g., 700 nM or less, 600 nMor less, 500 nM or less, 400 nM or less, 300 nM or less, 200 nM or less,100 nM or less, 90 nM or less, 80 nM or less, 70 nM or less, 60 nM orless, 50 nM or less, 40 nM or less, 30 nM or less, 20 nM or less, 10 nMor less, 9 nM or less, 8 nM or less, 7 nM or less, 6 nM or less, 5 nM orless, 4.5 nM or less, 4 nM or less, 3.5 nM or less, 3 nM or less, 2.5 nMor less, 2 nM or less, 1.5 nM or less, 1 nM or less, 0.9 nM or less, 0.8nM or less, 0.7 nM or less, 0.6 nM or less, 0.5 nM or less, 0.4 nM orless, 0.3 nM or less, 0.2 nM or less, or 0.1 nM or less).

In some examples, the compounds disclosed herein can have an EC₅₀ of 1pM or more at ERβ (e.g., 0.1 nM or more, 0.2 nM or more, 0.3 nM or more,0.4 nM or more, 0.5 nM or more, 0.6 nM or more, 0.7 nM or more, 0.8 nMor more, 0.9 nM or more, 1 nM or more, 1.5 nM or more, 2 nM or more, 2.5nM or more, 3 nM or more, 3.5 nM or more, 4 nM or more, 4.5 nM or more,5 nM or more, 6 nM or more, 7 nM or more, 8 nM or more, 9 nM or more, 10nM or more, 20 nM or more, 30 nM or more, 40 nM or more, 50 nM or more,60 nM or more, 70 nM or more, 80 nM or more, 90 nM or more, 100 nM ormore, 200 nM or more, 300 nM or more, 400 nM or more, 500 nM or more,600 nM or more, or 700 nM or more).

The EC₅₀ of the compound at ERβ can range from any of the minimum valuesdescribed above to any of the maximum values described above. Forexample, the compounds disclosed herein can have an EC₅₀ of from 1 pM to800 nM at ERβ (e.g., from 1 pM to 400 nM, from 400 nM to 800 nM, from 1pM to 300 nM, from 1 pM to 200 nM, from 1 pM to 100 nM, from 1 pM to 50nM, from 1 pM to 20 nM, from 1 pM to 10 nM, from 1 pM to 6 nM, from 1 pMto 5 nM, from 1 pM to 2 nM, from 1 pM to 1 nM, from 1 pM to 0.7 nM, from1 pM to 0.5 nM, from 1 pM to 0.2 pM, or from 1 pM to 0.1 nM).

In some examples, the compounds disclosed herein are selective ERβagonist. In some examples, a selective ERβ agonist is a compound thathas a lower EC₅₀ at ERβ than at estrogen receptor α (ERα). Theselectivity of the compounds can, in some examples, be expressed as anERβ-to-ERα agonist ratio, which is the EC₅₀ of the compound at ERαdivided by the EC₅₀ of the compound at ERβ. In some examples, thecompounds disclosed herein can have an ERβ-to-ERα agonist ratio of 8 ormore (e.g., 10 or more, 20 or more, 30 or more, 40 or more, 50 or more,60 or more, 70 or more, 80 or more, 90 or more, 100 or more, 150 ormore, 200 or more, 250 or more, 300 or more, 350 or more, 400 or more,450 or more, 500 or more, 600 or more, 700 or more, 800 or more, 900 ormore, 1000 or more, 1100 or more, 1200 or more, 1300 or more, 1400 ormore, 1500 or more, 2000 or more, 2500 or more).

In some examples, the compounds can have an ERβ-to-ERα agonist ratio of3000 or less (e.g., 2500 or less, 2000 or less, 1500 or less, 1400 orless, 1300 or less, 1200 or less, 1100 or less, 1000 or less, 900 orless, 800 or less, 700 or less, 600 or less, 500 or less, 450 or less,400 or less, 350 or less, 300 or less, 250 or less, 200 or less, 150 orless, 100 or less, 90 or less, 80 or less, 70 or less, 60 or less, 50 orless, 40 or less, 30 or less, 20 or less, or 10 or less).

The ERβ-to-ERα agonist ratio of the compounds at ERβ can range from anyof the minimum values described above to any of the maximum valuesdescribed above. For example, the compounds can have an ERβ-to-ERαagonist ratio of from 8 to 3000 (e.g., from 8 to 1500, from 1500 to3000, from 400 to 3000, from 500 to 3000, from 600 to 3000, from 700 to3000, from 800 to 3000, from 900 to 3000, from 1000 to 3000, or from2000 to 3000).

Also disclosed herein are pharmaceutical compositions comprising thecompounds described herein, and a pharmaceutically acceptable excipient.

Also disclosed herein are pharmaceutically-acceptable salts and prodrugsof the disclosed compounds. Pharmaceutically-acceptable salts includesalts of the disclosed compounds that are prepared with acids or bases,depending on the particular substituents found on the compounds. Underconditions where the compounds disclosed herein are sufficiently basicor acidic to form stable nontoxic acid or base salts, administration ofthe compounds as salts can be appropriate. Examples ofpharmaceutically-acceptable base addition salts include sodium,potassium, calcium, ammonium, or magnesium salt. Examples ofphysiologically-acceptable acid addition salts include hydrochloric,hydrobromic, nitric, phosphoric, carbonic, sulfuric, and organic acidslike acetic, propionic, benzoic, succinic, fumaric, mandelic, oxalic,citric, tartaric, malonic, ascorbic, alpha-ketoglutaric,alpha-glycophosphoric, maleic, tosyl acid, methanesulfonic, and thelike. Thus, disclosed herein are the hydrochloride, nitrate, phosphate,carbonate, bicarbonate, sulfate, acetate, propionate, benzoate,succinate, fumarate, mandelate, oxalate, citrate, tartarate, malonate,ascorbate, alpha-ketoglutarate, alpha-glycophosphate, maleate, tosylate,and mesylate salts. Pharmaceutically acceptable salts of a compound canbe obtained using standard procedures well known in the art, forexample, by reacting a sufficiently basic compound such as an amine witha suitable acid affording a physiologically acceptable anion. Alkalimetal (for example, sodium, potassium or lithium) or alkaline earthmetal (for example calcium) salts of carboxylic acids can also be made.

Methods of Making

The compounds described herein can be prepared in a variety of waysknown to one skilled in the art of organic synthesis or variationsthereon as appreciated by those skilled in the art. The compoundsdescribed herein can be prepared from readily available startingmaterials. Optimum reaction conditions can vary with the particularreactants or solvents used, but such conditions can be determined by oneskilled in the art.

Variations on the compounds described herein include the addition,subtraction, or movement of the various constituents as described foreach compound. Similarly, when one or more chiral centers are present ina molecule, the chirality of the molecule can be changed. Additionally,compound synthesis can involve the protection and deprotection ofvarious chemical groups. The use of protection and deprotection, and theselection of appropriate protecting groups can be determined by oneskilled in the art. The chemistry of protecting groups can be found, forexample, in Wuts and Greene, Protective Groups in Organic Synthesis, 4thEd., Wiley & Sons, 2006, which is incorporated herein by reference inits entirety.

The starting materials and reagents used in preparing the disclosedcompounds and compositions are either available from commercialsuppliers such as Katchem (Prague, Czech Republic), Aldrich ChemicalCo., (Milwaukee, Wis.), Acros Organics (Morris Plains, N.J.), FisherScientific (Pittsburgh, Pa.), Sigma (St. Louis, Mo.), Pfizer (New York,N.Y.), GlaxoSmithKline (Raleigh, N.C.), Merck (Whitehouse Station,N.J.), Johnson & Johnson (New Brunswick, N.J.), Aventis (Bridgewater,N.J.), AstraZeneca (Wilmington, Del.), Novartis (Basel, Switzerland),Wyeth (Madison, N.J.), Bristol-Myers-Squibb (New York, N.Y.), Roche(Basel, Switzerland), Lilly (Indianapolis, Ind.), Abbott (Abbott Park,Ill.), Schering Plough (Kenilworth, N.J.), or Boehringer Ingelheim(Ingelheim, Germany), or are prepared by methods known to those skilledin the art following procedures set forth in references such as Fieserand Fieser's Reagents for Organic Synthesis, Volumes 1-17 (John Wileyand Sons, 1991); Rodd's Chemistry of Carbon Compounds, Volumes 1-5 andSupplementals (Elsevier Science Publishers, 1989); Organic Reactions,Volumes 1-40 (John Wiley and Sons, 1991); March's Advanced OrganicChemistry, (John Wiley and Sons, 4th Edition); and Larock'sComprehensive Organic Transformations (VCH Publishers Inc., 1989). Othermaterials, such as the pharmaceutical excipients disclosed herein can beobtained from commercial sources.

Reactions to produce the compounds described herein can be carried outin solvents, which can be selected by one of skill in the art of organicsynthesis. Solvents can be substantially nonreactive with the startingmaterials (reactants), the intermediates, or products under theconditions at which the reactions are carried out, i.e., temperature andpressure. Reactions can be carried out in one solvent or a mixture ofmore than one solvent. Product or intermediate formation can bemonitored according to any suitable method known in the art. Forexample, product formation can be monitored by spectroscopic means, suchas nuclear magnetic resonance spectroscopy (e.g., ¹H or ¹³C) infraredspectroscopy, spectrophotometry (e.g., UV-visible), or massspectrometry, or by chromatography such as high performance liquidchromatography (HPLC) or thin layer chromatography.

Methods of Use

Also provided herein are methods of use of the compounds or compositionsdescribed herein. Also provided herein are methods for treating adisease or pathology in a subject in need thereof comprisingadministering to the subject a therapeutically effective amount of anyof the compounds or compositions described herein.

Also provided herein are methods of treating, preventing, orameliorating cancer in a subject. The methods include administering to asubject a therapeutically effective amount of one or more of thecompounds or compositions described herein, or a pharmaceuticallyacceptable salt thereof. The compounds and compositions described hereinor pharmaceutically acceptable salts thereof are useful for treatingcancer in humans, e.g., pediatric and geriatric populations, and inanimals, e.g., veterinary applications. The disclosed methods canoptionally include identifying a patient who is or can be in need oftreatment of a cancer. Examples of cancer types treatable by thecompounds and compositions described herein include bladder cancer,brain cancer, breast cancer, colorectal cancer, cervical cancer,gastrointestinal cancer, genitourinary cancer, head and neck cancer,lung cancer, ovarian cancer, pancreatic cancer, prostate cancer, renalcancer, skin cancer, and testicular cancer. Further examples includecancer and/or tumors of the anus, bile duct, bone, bone marrow, bowel(including colon and rectum), eye, gall bladder, kidney, mouth, larynx,esophagus, stomach, testis, cervix, mesothelioma, neuroendocrine, penis,skin, spinal cord, thyroid, vagina, vulva, uterus, liver, muscle, bloodcells (including lymphocytes and other immune system cells). Furtherexamples of cancers treatable by the compounds and compositionsdescribed herein include carcinomas, Karposi's sarcoma, melanoma,mesothelioma, soft tissue sarcoma, pancreatic cancer, lung cancer,leukemia (acute lymphoblastic, acute myeloid, chronic lymphocytic,chronic myeloid, and other), and lymphoma (Hodgkin's and non-Hodgkin's),and multiple myeloma. In some examples, the cancer can be selected fromthe group consisting of breast cancer, colorectal cancer, and prostatecancer.

The methods of treatment or prevention of cancer described herein canfurther include treatment with one or more additional agents (e.g., ananti-cancer agent or ionizing radiation). The one or more additionalagents and the compounds and compositions or pharmaceutically acceptablesalts thereof as described herein can be administered in any order,including simultaneous administration, as well as temporally spacedorder of up to several days apart. The methods can also include morethan a single administration of the one or more additional agents and/orthe compounds and compositions or pharmaceutically acceptable saltsthereof as described herein. The administration of the one or moreadditional agents and the compounds and compositions or pharmaceuticallyacceptable salts thereof as described herein can be by the same ordifferent routes. When treating with one or more additional agents, thecompounds and compositions or pharmaceutically acceptable salts thereofas described herein can be combined into a pharmaceutical compositionthat includes the one or more additional agents.

For example, the compounds or compositions or pharmaceuticallyacceptable salts thereof as described herein can be combined into apharmaceutical composition with an additional anti-cancer agent, such as13-cis-Retinoic Acid, 2-Amino-6-Mercaptopurine, 2-CdA,2-Chlorodeoxyadenosine, 5-fluorouracil, 6-Thioguanine, 6-Mercaptopurine,Accutane, Actinomycin-D, Adriamycin, Adrucil, Agrylin, Ala-Cort,Aldesleukin, Alemtuzumab, Alitretinoin, Alkaban-AQ, Alkeran,All-transretinoic acid, Alpha interferon, Altretamine, Amethopterin,Amifostine, Aminoglutethimide, Anagrelide, Anandron, Anastrozole,Arabinosylcytosine, Aranesp, Aredia, Arimidex, Aromasin, Arsenictrioxide, Asparaginase, ATRA, Avastin, BCG, BCNU, Bevacizumab,Bexarotene, Bicalutamide, BiCNU, Blenoxane, Bleomycin, Bortezomib,Busulfan, Busulfex, C225, Calcium Leucovorin, Campath, Camptosar,Camptothecin-11, Capecitabine, Carac, Carboplatin, Carmustine,Carmustine wafer, Casodex, CCNU, CDDP, CeeNU, Cerubidine, cetuximab,Chlorambucil, Cisplatin, Citrovorum Factor, Cladribine, Cortisone,Cosmegen, CPT-11, Cyclophosphamide, Cytadren, Cytarabine, Cytarabineliposomal, Cytosar-U, Cytoxan, Dacarbazine, Dactinomycin, Darbepoetinalfa, Daunomycin, Daunorubicin, Daunorubicin hydrochloride, Daunorubicinliposomal, DaunoXome, Decadron, Delta-Cortef, Deltasone, Denileukindiftitox, DepoCyt, Dexamethasone, Dexamethasone acetate, Dexamethasonesodium phosphate, Dexasone, Dexrazoxane, DHAD, DIC, Diodex, Docetaxel,Doxil, Doxorubicin, Doxorubicin liposomal, Droxia, DTIC, DTIC-Dome,Duralone, Efudex, Eligard, Ellence, Eloxatin, Elspar, Emcyt, Epirubicin,Epoetin alfa, Erbitux, Erwinia L-asparaginase, Estramustine, Ethyol,Etopophos, Etoposide, Etoposide phosphate, Eulexin, Evista, Exemestane,Fareston, Faslodex, Femara, Filgrastim, Floxuridine, Fludara,Fludarabine, Fluoroplex, Fluorouracil, Fluorouracil (cream),Fluoxymesterone, Flutamide, Folinic Acid, FUDR, Fulvestrant, G-CSF,Gefitinib, Gemcitabine, Gemtuzumab ozogamicin, Gemzar, Gleevec, Lupron,Lupron Depot, Matulane, Maxidex, Mechlorethamine, -MechlorethamineHydrochlorine, Medralone, Medrol, Megace, Megestrol, Megestrol Acetate,Melphalan, Mercaptopurine, Mesna, Mesnex, Methotrexate, MethotrexateSodium, Methylprednisolone, Mylocel, Letrozole, Neosar, Neulasta,Neumega, Neupogen, Nilandron, Nilutamide, Nitrogen Mustard, Novaldex,Novantrone, Octreotide, Octreotide acetate, Oncospar, Oncovin, Ontak,Onxal, Oprevelkin, Orapred, Orasone, Oxaliplatin, Paclitaxel,Pamidronate, Panretin, Paraplatin, Pediapred, PEG Interferon,Pegaspargase, Pegfilgrastim, PEG-INTRON, PEG-L-asparaginase,Phenylalanine Mustard, Platinol, Platinol-AQ, Prednisolone, Prednisone,Prelone, Procarbazine, PROCRIT, Proleukin, Prolifeprospan 20 withCarmustine implant, Purinethol, Raloxifene, Rheumatrex, Rituxan,Rituximab, Roveron-A (interferon alfa-2a), Rubex, Rubidomycinhydrochloride, Sandostatin, Sandostatin LAR, Sargramostim, Solu-Cortef,Solu-Medrol, STI-571, Streptozocin, Tamoxifen, Targretin, Taxol,Taxotere, Temodar, Temozolomide, Teniposide, TESPA, Thalidomide,Thalomid, TheraCys, Thioguanine, Thioguanine Tabloid, Thiophosphoamide,Thioplex, Thiotepa, TICE, Toposar, Topotecan, Toremifene, Trastuzumab,Tretinoin, Trexall, Trisenox, TSPA, VCR, Velban, Velcade, VePesid,Vesanoid, Viadur, Vinblastine, Vinblastine Sulfate, Vincasar Pfs,Vincristine, Vinorelbine, Vinorelbine tartrate, VLB, VP-16, Vumon,Xeloda, Zanosar, Zevalin, Zinecard, Zoladex, Zoledronic acid, Zometa,Gliadel wafer, Glivec, GM-CSF, Goserelin, granulocyte colony stimulatingfactor, Halotestin, Herceptin, Hexadrol, Hexalen, Hexamethylmelamine,HMM, Hycamtin, Hydrea, Hydrocort Acetate, Hydrocortisone, Hydrocortisonesodium phosphate, Hydrocortisone sodium succinate, Hydrocortonephosphate, Hydroxyurea, Ibritumomab, Ibritumomab Tiuxetan, Idamycin,Idarubicin, Ifex, IFN-alpha, Ifosfamide, IL 2, IL-11, Imatinib mesylate,Imidazole Carboxamide, Interferon alfa, Interferon Alfa-2b (PEGconjugate), Interleukin 2, Interleukin-11, Intron A (interferonalfa-2b), Leucovorin, Leukeran, Leukine, Leuprolide, Leurocristine,Leustatin, Liposomal Ara-C, Liquid Pred, Lomustine, L-PAM, L-Sarcolysin,Meticorten, Mitomycin, Mitomycin-C, Mitoxantrone, M-Prednisol, MTC, MTX,Mustargen, Mustine, Mutamycin, Myleran, Iressa, Irinotecan,Isotretinoin, Kidrolase, Lanacort, L-asparaginase, and LCR. Theadditional anti-cancer agent can also include biopharmaceuticals suchas, for example, antibodies.

Many tumors and cancers have viral genome present in the tumor or cancercells. For example, Epstein-Barr Virus (EBV) is associated with a numberof mammalian malignancies. The compounds disclosed herein can also beused alone or in combination with anticancer or antiviral agents, suchas ganciclovir, azidothymidine (AZT), lamivudine (3TC), etc., to treatpatients infected with a virus that can cause cellular transformationand/or to treat patients having a tumor or cancer that is associatedwith the presence of viral genome in the cells. The compounds disclosedherein can also be used in combination with viral based treatments ofoncologic disease.

Also described herein are methods of suppressing tumor growth in asubject. The method includes contacting at least a portion of the tumorwith a therapeutically effective amount of a compound or composition asdescribed herein, and optionally includes the step of irradiating atleast a portion of the tumor with a therapeutically effective amount ofionizing radiation. As used herein, the term ionizing radiation refersto radiation comprising particles or photons that have sufficient energyor can produce sufficient energy via nuclear interactions to produceionization. An example of ionizing radiation is x-radiation. Atherapeutically effective amount of ionizing radiation refers to a doseof ionizing radiation that produces an increase in cell damage or deathwhen administered in combination with the compounds described herein.The ionizing radiation can be delivered according to methods as known inthe art, including administering radiolabeled antibodies andradioisotopes.

Also described herein are methods of treating an inflammatory disease ina subject. The methods can include administering to the subject atherapeutically effective amount of a compound or a composition asdescribed herein. Inflammatory diseases include, but are not limited to,acne vulgaris, ankylosing spondylitis, asthma, autoimmune diseases,Celiac disease, chronic prostatitis, Crohn's disease,glomerulonephritis, hidradenitis suppurativa, inflammatory boweldiseases, pelvic inflammatory disease, psoriasis, reperfusion injury,rheumatoid arthritis, sarcoidosis, vasculitis, interstitial cystitis,type 1 hypersensitivities, systemic sclerosis, dermatomyositis,polymyositis, and inclusion body myositis. In some examples, theinflammatory disease is selected from the group consisting of arthritisand inflammatory bowel disease.

The methods of treatment of inflammatory diseases described herein canfurther include treatment with one or more additional agents (e.g., ananti-inflammatory agent). The one or more additional agents and thecompounds and compositions or pharmaceutically acceptable salts thereofas described herein can be administered in any order, includingsimultaneous administration, as well as temporally spaced order of up toseveral days apart. The methods can also include more than a singleadministration of the one or more additional agents and/or the compoundsand compositions or pharmaceutically acceptable salts thereof asdescribed herein. The administration of the one or more additionalagents and the compounds and compositions or pharmaceutically acceptablesalts thereof as described herein can be by the same or differentroutes. When treating with one or more additional agents, the compoundsand compositions or pharmaceutically acceptable salts thereof asdescribed herein can be combined into a pharmaceutical composition thatincludes the one or more additional agents.

Also disclosed herein are methods of treating a neurodegenerativedisease in a subject. The methods can comprise administering to thesubject a therapeutically effective amount of a compound or acomposition as described herein. Neurodegenerative diseases include, butare not limited to, Alzheimer's disease, amyotrophic lateral sclerosis(ALS), Alpers' disease, batten disease, Benson's syndrome,Cerebro-oculo-facio-skeletal (COFS) syndrome, corticobasal degeneration,Creutzfeldt-Jakob disease, dementias, Friedreich's ataxia,Gerstmann-Strussler-Scheinker disease, Huntington's disease, Lewy bodysyndrome, Leigh's disease, monomelic amyotrophy, motor neuron diseases,multiple system atrophy, opsoclonus myoclonus, progressive multifocalleukoencephalopathy, Parkinson's disease, Prion diseases, primaryprogressive aphasia, progressive supranuclear palsy, spinocerebellarataxia, spinal muscular atrophy, kuru, and Shy-Drager syndrome.

Also disclosed herein are methods of treating a psychotropic disorder ina subject. The methods can comprise administering to the subject atherapeutically effective amount of a compound or a composition asdescribed herein. Psychotropic disorders include, but are not limitedto, attention deficit disorder (ADD), attention deficit hyperactivedisorder (ADHD), anorexia nervosa, anxiety, dipolar disorder, bulimia,depression, insomnia, neuropathic pain, mania, obsessive compulsivedisorder (OCD), panic disorder, premenstrual dysphoric disorder (PMDD),mood disorder, serotonin syndrome, schizophrenia, and seasonal affectivedisorder.

The compounds described herein can also be used to treat otherERβ-related (ERβ-mediated) diseases, including cardiovascular diseases(e.g., heart attack, heart failure, ischemic stroke, arrhythmia), benignprostatic hyperplasia, and osteoporosis.

Also disclosed herein are methods of imaging a cell or a population ofcells expressing ERβ within or about a subject. The methods can compriseadministering to the subject an amount of a compound or a composition asdescribed herein; and detecting the compound or the composition. Thedetecting can involve methods known in the art, for example, positronemission tomography *PET), single-photon emission computed tomography(SPECT), magnetic resonance imaging (MRI), X-ray, microscopy, computedtomography (CT). In some examples, the compound or composition canfurther comprise a detectable label, such as a radiolabel, fluorescentlabel, enzymatic label, and the like. In some examples, the detectablelabel can comprise a radiolabel, such as ¹⁰B. Such imaging methods canbe used, for example, for assessing the extent of a disease and/or thetarget of a therapeutic agent.

The methods and compounds as described herein are useful for bothprophylactic and therapeutic treatment. As used herein the term treatingor treatment includes prevention; delay in onset; diminution,eradication, or delay in exacerbation of signs or symptoms after onset;and prevention of relapse. For prophylactic use, a therapeuticallyeffective amount of the compounds and compositions or pharmaceuticallyacceptable salts thereof as described herein are administered to asubject prior to onset (e.g., before obvious signs of the disease ordisorder), during early onset (e.g., upon initial signs and symptoms ofthe disease or disorder), or after an established development of thedisease or disorder. Prophylactic administration can occur for severaldays to years prior to the manifestation of symptoms of a disease ordisorder. Therapeutic treatment involves administering to a subject atherapeutically effective amount of the compounds and compositions orpharmaceutically acceptable salts thereof as described herein after thedisease or disorder is diagnosed.

Compositions, Formulations and Methods of Administration

In vivo application of the disclosed compounds, and compositionscontaining them, can be accomplished by any suitable method andtechnique presently or prospectively known to those skilled in the art.For example, the disclosed compounds can be formulated in aphysiologically- or pharmaceutically-acceptable form and administered byany suitable route known in the art including, for example, oral, nasal,rectal, topical, and parenteral routes of administration. As usedherein, the term parenteral includes subcutaneous, intradermal,intravenous, intramuscular, intraperitoneal, and intrasternaladministration, such as by injection. Administration of the disclosedcompounds or compositions can be a single administration, or atcontinuous or distinct intervals as can be readily determined by aperson skilled in the art.

The compounds disclosed herein, and compositions comprising them, canalso be administered utilizing liposome technology, slow releasecapsules, implantable pumps, and biodegradable containers. Thesedelivery methods can, advantageously, provide a uniform dosage over anextended period of time. The compounds can also be administered in theirsalt derivative forms or crystalline forms.

The compounds disclosed herein can be formulated according to knownmethods for preparing pharmaceutically acceptable compositions.Formulations are described in detail in a number of sources which arewell known and readily available to those skilled in the art. Forexample, Remington's Pharmaceutical Science by E. W. Martin (1995)describes formulations that can be used in connection with the disclosedmethods. In general, the compounds disclosed herein can be formulatedsuch that a therapeutically effective amount of the compound is combinedwith a suitable excipient in order to facilitate effectiveadministration of the compound. The compositions used can also be in avariety of forms. These include, for example, solid, semi-solid, andliquid dosage forms, such as tablets, pills, powders, liquid solutionsor suspension, suppositories, injectable and infusible solutions, andsprays. The preferred form depends on the intended mode ofadministration and therapeutic application. The compositions alsopreferably include conventional pharmaceutically-acceptable carriers anddiluents which are known to those skilled in the art. Examples ofcarriers or diluents for use with the compounds include ethanol,dimethyl sulfoxide, glycerol, alumina, starch, saline, and equivalentcarriers and diluents. To provide for the administration of such dosagesfor the desired therapeutic treatment, compositions disclosed herein canadvantageously comprise between about 0.1% and 100% by weight of thetotal of one or more of the subject compounds based on the weight of thetotal composition including carrier or diluent.

Formulations suitable for administration include, for example, aqueoussterile injection solutions, which can contain antioxidants, buffers,bacteriostats, and solutes that render the formulation isotonic with theblood of the intended recipient; and aqueous and nonaqueous sterilesuspensions, which can include suspending agents and thickening agents.The formulations can be presented in unit-dose or multi-dose containers,for example sealed ampoules and vials, and can be stored in a freezedried (lyophilized) condition requiring only the condition of thesterile liquid carrier, for example, water for injections, prior to use.Extemporaneous injection solutions and suspensions can be prepared fromsterile powder, granules, tablets, etc. It should be understood that inaddition to the excipients particularly mentioned above, thecompositions disclosed herein can include other agents conventional inthe art having regard to the type of formulation in question.

Compounds disclosed herein, and compositions comprising them, can bedelivered to a cell either through direct contact with the cell or via acarrier means. Carrier means for delivering compounds and compositionsto cells are known in the art and include, for example, encapsulatingthe composition in a liposome moiety. Another means for delivery ofcompounds and compositions disclosed herein to a cell comprisesattaching the compounds to a protein or nucleic acid that is targetedfor delivery to the target cell. U.S. Pat. No. 6,960,648 and U.S.Application Publication Nos. 20030032594 and 20020120100 disclose aminoacid sequences that can be coupled to another composition and thatallows the composition to be translocated across biological membranes.U.S. Application Publication No. 20020035243 also describes compositionsfor transporting biological moieties across cell membranes forintracellular delivery. Compounds can also be incorporated intopolymers, examples of which include poly (D-L lactide-co-glycolide)polymer for intracranial tumors; poly[bis(p-carboxyphenoxy)propane:sebacic acid] in a 20:80 molar ratio (as used in GLIADEL);chondroitin; chitin; and chitosan.

For the treatment of oncological disorders, the compounds disclosedherein can be administered to a patient in need of treatment incombination with other antitumor or anticancer substances and/or withradiation and/or photodynamic therapy and/or with surgical treatment toremove a tumor. These other substances or treatments can be given at thesame as or at different times from the compounds disclosed herein. Forexample, the compounds disclosed herein can be used in combination withmitotic inhibitors such as taxol or vinblastine, alkylating agents suchas cyclophosamide or ifosfamide, antimetabolites such as 5-fluorouracilor hydroxyurea, DNA intercalators such as adriamycin or bleomycin,topoisomerase inhibitors such as etoposide or camptothecin,antiangiogenic agents such as angiostatin, antiestrogens such astamoxifen, and/or other anti-cancer drugs or antibodies, such as, forexample, GLEEVEC (Novartis Pharmaceuticals Corporation) and HERCEPTIN(Genentech, Inc.), respectively, or an immunotherapeutic such asipilimumab and bortezomib.

In certain examples, compounds and compositions disclosed herein can belocally administered at one or more anatomical sites, such as sites ofunwanted cell growth (such as a tumor site or benign skin growth, e.g.,injected or topically applied to the tumor or skin growth), optionallyin combination with a pharmaceutically acceptable carrier such as aninert diluent. Compounds and compositions disclosed herein can besystemically administered, such as intravenously or orally, optionallyin combination with a pharmaceutically acceptable carrier such as aninert diluent, or an assimilable edible carrier for oral delivery. Theycan be enclosed in hard or soft shell gelatin capsules, can becompressed into tablets, or can be incorporated directly with the foodof the patient's diet. For oral therapeutic administration, the activecompound can be combined with one or more excipients and used in theform of ingestible tablets, buccal tablets, troches, capsules, elixirs,suspensions, syrups, wafers, aerosol sprays, and the like.

The tablets, troches, pills, capsules, and the like can also contain thefollowing: binders such as gum tragacanth, acacia, corn starch orgelatin; diluents such as dicalcium phosphate; a disintegrating agentsuch as corn starch, potato starch, alginic acid and the like; alubricant such as magnesium stearate; and a sweetening agent such assucrose, fructose, lactose or aspartame or a flavoring agent such aspeppermint, oil of wintergreen, or cherry flavoring can be added. Whenthe unit dosage form is a capsule, it can contain, in addition tomaterials of the above type, a liquid carrier, such as a vegetable oilor a polyethylene glycol. Various other materials can be present ascoatings or to otherwise modify the physical form of the solid unitdosage form. For instance, tablets, pills, or capsules can be coatedwith gelatin, wax, shellac, or sugar and the like. A syrup or elixir cancontain the active compound, sucrose or fructose as a sweetening agent,methyl and propylparabens as preservatives, a dye and flavoring such ascherry or orange flavor. Of course, any material used in preparing anyunit dosage form should be pharmaceutically acceptable and substantiallynon-toxic in the amounts employed. In addition, the active compound canbe incorporated into sustained-release preparations and devices.

Compounds and compositions disclosed herein, including pharmaceuticallyacceptable salts or prodrugs thereof, can be administered intravenously,intramuscularly, or intraperitoneally by infusion or injection.Solutions of the active agent or its salts can be prepared in water,optionally mixed with a nontoxic surfactant. Dispersions can also beprepared in glycerol, liquid polyethylene glycols, triacetin, andmixtures thereof and in oils. Under ordinary conditions of storage anduse, these preparations can contain a preservative to prevent the growthof microorganisms.

The pharmaceutical dosage forms suitable for injection or infusion caninclude sterile aqueous solutions or dispersions or sterile powderscomprising the active ingredient, which are adapted for theextemporaneous preparation of sterile injectable or infusible solutionsor dispersions, optionally encapsulated in liposomes. The ultimatedosage form should be sterile, fluid and stable under the conditions ofmanufacture and storage. The liquid carrier or vehicle can be a solventor liquid dispersion medium comprising, for example, water, ethanol, apolyol (for example, glycerol, propylene glycol, liquid polyethyleneglycols, and the like), vegetable oils, nontoxic glyceryl esters, andsuitable mixtures thereof. The proper fluidity can be maintained, forexample, by the formation of liposomes, by the maintenance of therequired particle size in the case of dispersions or by the use ofsurfactants. Optionally, the prevention of the action of microorganismscan be brought about by various other antibacterial and antifungalagents, for example, parabens, chlorobutanol, phenol, sorbic acid,thimerosal, and the like. In many cases, it will be preferable toinclude isotonic agents, for example, sugars, buffers or sodiumchloride. Prolonged absorption of the injectable compositions can bebrought about by the inclusion of agents that delay absorption, forexample, aluminum monostearate and gelatin.

Sterile injectable solutions are prepared by incorporating a compoundand/or agent disclosed herein in the required amount in the appropriatesolvent with various other ingredients enumerated above, as required,followed by filter sterilization. In the case of sterile powders for thepreparation of sterile injectable solutions, the preferred methods ofpreparation are vacuum drying and the freeze drying techniques, whichyield a powder of the active ingredient plus any additional desiredingredient present in the previously sterile-filtered solutions.

For topical administration, compounds and agents disclosed herein can beapplied in as a liquid or solid. However, it will generally be desirableto administer them topically to the skin as compositions, in combinationwith a dermatologically acceptable carrier, which can be a solid or aliquid. Compounds and agents and compositions disclosed herein can beapplied topically to a subject's skin to reduce the size (and caninclude complete removal) of malignant or benign growths, or to treat aninfection site. Compounds and agents disclosed herein can be applieddirectly to the growth or infection site. Preferably, the compounds andagents are applied to the growth or infection site in a formulation suchas an ointment, cream, lotion, solution, tincture, or the like.

Useful solid carriers include finely divided solids such as talc, clay,microcrystalline cellulose, silica, alumina and the like. Useful liquidcarriers include water, alcohols or glycols or water-alcohol/glycolblends, in which the compounds can be dissolved or dispersed ateffective levels, optionally with the aid of non-toxic surfactants.Adjuvants such as fragrances and additional antimicrobial agents can beadded to optimize the properties for a given use. The resultant liquidcompositions can be applied from absorbent pads, used to impregnatebandages and other dressings, or sprayed onto the affected area usingpump-type or aerosol sprayers, for example.

Thickeners such as synthetic polymers, fatty acids, fatty acid salts andesters, fatty alcohols, modified celluloses or modified mineralmaterials can also be employed with liquid carriers to form spreadablepastes, gels, ointments, soaps, and the like, for application directlyto the skin of the user.

Useful dosages of the compounds and agents and pharmaceuticalcompositions disclosed herein can be determined by comparing their invitro activity, and in vivo activity in animal models. Methods for theextrapolation of effective dosages in mice, and other animals, to humansare known to the art.

The dosage ranges for the administration of the compositions are thoselarge enough to produce the desired effect in which the symptoms ordisorder are affected. The dosage should not be so large as to causeadverse side effects, such as unwanted cross-reactions, anaphylacticreactions, and the like. Generally, the dosage will vary with the age,condition, sex and extent of the disease in the patient and can bedetermined by one of skill in the art. The dosage can be adjusted by theindividual physician in the event of any counterindications. Dosage canvary, and can be administered in one or more dose administrations daily,for one or several days.

Also disclosed are pharmaceutical compositions that comprise a compounddisclosed herein in combination with a pharmaceutically acceptableexcipient. Pharmaceutical compositions adapted for oral, topical orparenteral administration, comprising an amount of a compound constitutea preferred aspect. The dose administered to a patient, particularly ahuman, should be sufficient to achieve a therapeutic response in thepatient over a reasonable time frame, without lethal toxicity, andpreferably causing no more than an acceptable level of side effects ormorbidity. One skilled in the art will recognize that dosage will dependupon a variety of factors including the condition (health) of thesubject, the body weight of the subject, kind of concurrent treatment,if any, frequency of treatment, therapeutic ratio, as well as theseverity and stage of the pathological condition.

Also disclosed are kits that comprise a compound disclosed herein in oneor more containers. The disclosed kits can optionally includepharmaceutically acceptable carriers and/or diluents. In one embodiment,a kit includes one or more other components, adjuncts, or adjuvants asdescribed herein. In another embodiment, a kit includes one or moreanti-cancer agents, such as those agents described herein. In oneembodiment, a kit includes instructions or packaging materials thatdescribe how to administer a compound or composition of the kit.Containers of the kit can be of any suitable material, e.g., glass,plastic, metal, etc., and of any suitable size, shape, or configuration.In one embodiment, a compound and/or agent disclosed herein is providedin the kit as a solid, such as a tablet, pill, or powder form. Inanother embodiment, a compound and/or agent disclosed herein is providedin the kit as a liquid or solution. In one embodiment, the kit comprisesan ampoule or syringe containing a compound and/or agent disclosedherein in liquid or solution form.

A number of embodiments of the invention have been described.Nevertheless, it will be understood that various modifications may bemade without departing from the spirit and scope of the invention.Accordingly, other embodiments are within the scope of the followingclaims.

EXAMPLES

The following examples are set forth to illustrate the methods andresults according to the disclosed subject matter. These examples arenot intended to be inclusive of all aspects of the subject matterdisclosed herein, but rather to illustrate representative methods andresults. These examples are not intended to exclude equivalents andvariations which are apparent to one skilled in the art.

Efforts have been made to ensure accuracy with respect to numbers (e.g.,amounts, temperature, etc.) but some errors and deviations should beaccounted for. Unless indicated otherwise, parts are parts by weight,temperature is in ° C. or is at ambient temperature, and pressure is ator near atmospheric. There are numerous variations and combinations ofreaction conditions, e.g., component concentrations, temperatures,pressures and other reaction ranges and conditions that can be used tooptimize the product purity and yield obtained from the describedprocess. Only reasonable and routine experimentation will be required tooptimize such process conditions.

¹H- and ¹³C-NMR spectra were recorded at The Ohio State UniversityCollege of Pharmacy using a Bruker AVIII400HD NMR spectrometer or aBruker DRX400 NMR spectrometer, or at The Ohio State University CampusChemical Instrumentation Center using a Bruker Ascend 700 MHz NMR at.Chemical shifts (δ) are reported in ppm from internal deuteratedchloroform or deuterated acetone. Coupling constants are reported in Hz.¹³C NMR spectra are fully decoupled. NMR spectra were analyzed withMnova Lite SE (Mestrelab Research, Bajo, Spain). Melting points wereobtained on a Thomas Hoover “UNI-MELT” capillary melting apparatus.Optical rotation was measured on a JASCO J-810 spectropolarimeter.Accurate and high resolution mass spectra were obtained from Ohio StateUniversity Campus Chemical Instrumentation Center using a WatersMicromass LCT mass spectrometer or a Waters Micromass Q-TOF II massspectrometer, from The Ohio State University College of Pharmacy using aWaters Micromass Q-TOF micro mass spectrometer or a Thermo LTQ Orbitrapmass spectrometer, or from the University of Illinois Urbana-ChampaignMass Spectrometry Laboratory using a Waters Micromass 70-VSE massspectrometer. For all carborane-containing compounds, the found masscorresponding to the most intense peak of the theoretical isotopicpattern was reported. Measured patterns agreed with calculated patterns.

Silica gel 60 (0.063-0.200 mm), used for gravity column chromatography.Reagent-grade solvents were used for silica gel column chromatography.Precoated glass-backed TLC plates with silica gel 60 F254 (0.25-mm layerthickness) from Dynamic Adsorbents (Norcross, Ga.) were used for TLC.General compound visualization for TLC was achieved by UV light.Carborane-containing compounds were selectively visualized by sprayingthe plate with a 0.06% PdCl₂/1% HCl solution and heating at 120° C.,which caused the slow (15-45 s) formation of a gray spot due to thereduction of Pd²⁺ to Pd⁰. Chiral analytical HPLC was conducted using aCHIRAL PAK® IB-3 column (250×4.6 mm, 3 m particle size) supplied byChiral Technologies, PA, USA using on a Hitachi HPLC system (L-2130)with a Windows based data acquisition and Hitachi Diode array detector(L-2455). HPLC-grade solvents were used for HPLC.

Anhydrous solvents for reactions were purchased directly from AcrosOrganics (Morris Plains, N.J.) or from Sigma Aldrich (Milwaukee, Wis.).Other solvents and chemicals were obtained from standard vendors. Unlessspecified otherwise, all reactions were carried out under argonatmosphere.

Example 1

To a solution of 1-(4-methoxyphenyl)-1,12-dicarba-closo-dodecaborane(Endo Y et al. Chemistry & Biology, 2001, 8, 341-355) (500 mg, 2 mmol)in anhydrous dimethoxyethane (DME, 40 mL) was added n-butyllithium (1mL, 2.5 mmol, 2.5 M solution in hexanes) at 0° C. The reaction mixturewas stirred at room temperature for 1.5 h. A quantity of 0.49 mL (3.0mmol) 1-iodoheptane was added at 0° C. Following stirring at roomtemperature for 4 h, the reaction mixture was carefully poured into 60mL of 1 M HCl and extracted with ethyl acetate. The organic phase waswashed with a 10% sodium thiosulfate solution and brine and dried overMgSO₄. The solvents were evaporated and the residue purified by silicagel column chromatography (hexanes, R_(f): 0.38) to yield 550 mg (79%)product as a white solid which had a melting point of 45-46° C.

¹H NMR (CDCl₃): δ 0.87 (t, 3H, CH₃), 1.08-1.28 (m, 10H, 5×CH₂), 1.64 (m,2H, C_(carborane)—CH₂), 1.85-3.0 (br. m, 10H, BH), 3.74 (s, 3H, OCH₃),6.67 (d, 2H, arom., J=9.0 Hz), 7.11 (d, 2H, arom., J=9.0 Hz). ¹³C NMR(CDCl₃): δ 14.21, 22.73, 29.02, 29.24, 29.67, 31.82, 38.05, 55.39,80.92, 113.36, 128.49, 128.97, 159.61. Accurate mass HRMS (EI+): m/zcalcd. For C₁₆H₃₂B₁₀O (M)⁺ 348.3465, found 348.3461.

Example 2

To a solution of 1-(4-methoxyphenyl)-1,12-dicarba-closo-dodecaborane(Endo Y et al. Chemistry & Biology, 2001, 8, 341-355) (500 mg, 10 mmol)in anhydrous dimethoxyethane DME (100 mL) was added n-butyllithium (4.8mL, 12 mmol, 2.5 M solution in hexanes) at 0° C. The reaction mixturewas stirred at room temperature for 1.5 h. A quantity of 1.83 mL (13mmol) 1-heptanal was added at 0° C. Following stirring at roomtemperature overnight, the reaction mixture was carefully poured into150 mL of 1 M HCl and extracted with ethyl acetate. The organic phasewas washed with brine and dried over MgSO₄. The solvents were evaporatedand the residue purified by column chromatography (hexanes/EtOAc, 19/1,v/v, R_(f): 0.43) to yield 3.0 g (82%) of a white solid which had amelting point of 104-105° C.

¹H NMR (CDCl₃): δ 0.88 (t, 3H, CH₃), 1.15-1.30 (m, 8H, 4×CH₂), 1.38-1.47(m, 2H, CH₂), 1.59 (br.s, 1H, OH), 1.85-3.0 (br. m, 10H, BH), 3.47 (m,1H, CH), 3.74 (s, 3H, OCH₃), 6.68 (d, 2H, arom., J=9.0 Hz), 7.12 (d, 2H,arom., J=9.0 Hz). ¹³C NMR (CDCl₃): δ 14.20, 22.71, 26.59, 28.98, 31.83,36.92, 55.39, 73.10, 83.53, 86.36, 113.41, 128.43, 128.84, 159.73.Accurate mass HRMS (EI+): m/z calcd for C₁₆H₃₂B₁₀O₂(M)⁺ 364.3414, found364.3423.

Example 3

For the synthesis(RS)-1-[1-(4-methoxyphenyl)-1,12-dicarba-closo-dodecaborane-12-yl]butane-1-ol,the procedure and conditions described for the synthesis of(RS)-1-[1-(4-methoxyphenyl)-1,12-dicarba-closo-dodecaborane-12-yl]heptane-1-olwere adapted using 500 mg (2 mmol)1-(4-methoxyphenyl)-1,12-dicarba-closo-dodecaborane (Endo Y et al.Chemistry & Biology, 2001, 8, 341-355) as the starting material.

Yield: 500 mg (78%, white solid), R_(f): 0.33 (hexanes/EtOAc, 19/1,v/v), m.p.: 96-97° C. ¹H NMR (CDCl₃): δ 0.87 (t, 3H, CH₃), 1.16-1.27 (m,4H, 2×CH₂), 1.35-1.39 (m, 2H, CH₂), 1.45-152 (m, 2H, CH₂), 1.59 (br. s,1H, OH), 1.85-3.0 (br. m, 10H, BH), 3.49 (m, 1H, CH), 3.74 (s, 3H,OCH₃), 6.68 (d, 2H, arom., J=9.0 Hz), 7.12 (d, 2H, arom., J=9.0 Hz). ¹³CNMR (CDCl₃): δ 13.75, 19.82, 38.94, 55.40, 72.84, 83.54, 86.34, 113.42,128.43, 128.84, 159.73. Accurate mass HRMS (EI+): m/z calcd forC₁₃H₂₆B₁₀O₂(M)⁺ 322.2943, found 322.2929.

Example 4

For the synthesis of(RS)-1-[1-(4-methoxyphenyl)-1,12-dicarba-closo-dodecaborane-12-yl]-6-methylheptane-1-ol,the procedure and conditions described for the synthesis of(RS)-1-[1-(4-methoxyphenyl)-1,12-dicarba-closo-dodecaborane-12-yl]heptane-1-olwere adapted using 1 g (4 mmol)1-(4-methoxyphenyl)-1,12-dicarba-closo-dodecaborane (Endo Y et al.Chemistry & Biology, 2001, 8, 341-355) and 0.75 g (5.85 mmol) of6-methylheptanal (Kuhnke J & Bohlman F., Tetrahedron Lett. 1985, 26,3955-3958) as the starting materials.

Yield: 1.16 mg (77%, white solid), R_(f): 0.49 (hexanes/EtOAc, 19/1,v/v), m.p.: 95-96° C. ¹H NMR (CDCl₃): δ 0.85 (s, 3H, CH₃), 0.86 (s, 3H,CH₃), 1.11-1.28 (m, 6H, 3×CH₂), 1.39-1.44 (m, 2H, CH₂), 1.47-1.53 (m,1H, CH), 1.45-152 (m, 2H, CH₂), 1.58 (br. s, 1H, OH), 1.85-3.0 (br. m,10H, BH), 3.47 (m, 1H, CH), 3.74 (s, 3H, OCH₃), 6.68 (d, 2H, arom.,J=9.0 Hz), 7.12 (d, 2H, arom., J=9.0 Hz). ¹³C NMR (CDCl₃): δ 22.71,22.78, 26.89, 27.08, 28.04, 36.94, 38.95, 55.40, 73.10, 83.54, 86.39,113.42, 128.43, 128.84, 159.73. Accurate mass HRMS (EI+): m/z calcd forC₁₇H₃₄B₁₀O₂(M)⁺ 378.3571, found 378.3576.

Example 5

For the synthesis of(RS)-1-[1-(4-methoxyphenyl)-1,12-dicarba-closo-dodecaborane-12-yl]-3-phenylpropan-1-ol,the procedure and conditions described for the synthesis of(RS)-1-[1-(4-Methoxyphenyl)-1,12-dicarba-closo-dodecaborane-12-yl]heptane-1-olwere adapted using 250 mg (1 mmol)1-(4-methoxyphenyl)-1,12-dicarba-closo-dodecaborane (Endo Y et al.Chemistry & Biology, 2001, 8, 341-355) and 0.17 g (1.5 mmol) of3-phenylheptanal as the starting materials.

Yield: 344 mg (90%, white solid), R_(f): 0.27 (hexanes/EtOAc, 19/1,v/v), m.p.: 123-124° C. ¹H NMR (CDCl₃): δ 01.49-1.77 (m, 2H, CH₂), 1.69(br. s, 1H, OH), 1.85-3.0 (br. m, 10H, BH), 2.51-2.83 (m, 2H, CH₂), 3.48(m, 1H, CH), 3.74 (s, 3H, OCH₃), 6.68 (d, 2H, arom., J=9.0 Hz), 7.11 (d,2H, arom., J=9.0 Hz), 7.14 (d, 2H, arom.), 7.20 (t, 1H, arom.), 7.28 (t,2H, arom.). ¹³C NMR (CDCl₃): δ 32.69, 38.29, 55.39, 72.31, 83.64, 86.02,113.42, 126.19, 128.41, 128.52, 128.61, 128.77, 141.15, 159.74. Accuratemass HRMS (EI+): m/z calcd for C₁₈H₂₈B₁₀O₂(M)⁺384.3102, found 38.3101.

Example 6

For the synthesis of(RS)-(2,3-dihydro-1H-inden-5-yl)-[1-(4-methoxyphenyl)-1,12-dicarba-closo-dodecaborane-12-yl]methanol,the procedure and conditions described for the synthesis of(RS)-1-[1-(4-Methoxyphenyl)-1,12-dicarba-closo-dodecaborane-12-yl]heptane-1-olwere adapted using 450 mg (1.8 mmol)1-(4-methoxyphenyl)-1,12-dicarba-closo-dodecaborane (Endo Y et al.Chemistry & Biology, 2001, 8, 341-355) and 100 g (0.69 mmol) of5-formylindane as the starting materials. Subsequent to the reaction,excess 1-(4-methoxyphenyl)-1,12-dicarba-closo-dodecaborane was initiallyrecovered by column chromatography using hexanes only.

Yield: 240 mg (79%, white solid), R_(f): 0.28 (hexanes/EtOAc, 19/1,v/v), m.p.: 123-124° C. ¹H NMR (CDCl₃): δ 1.85-3.0 (br. m, 10H, BH),2.06-2.10 (m, 3H, CH₂, OH), 2.89 (m, 4H, 2×CH₂), 3.74 (s, 3H, OCH₃),4.46 (s, 1H, CH), 6.66 (d, 2H, arom., J=9.0 Hz), 6.92 (d, 1H, arom.),7.03 (s, 1H, arom.), 7.09 (d, 2H, arom., J=9.0 Hz), 7.15 (d, 2H, arom.).¹³C NMR (CDCl₃): δ 25.56, 32.77, 32.95, 55.39, 76.11, 83.65, 85.84,113.39, 122.74, 123.95, 124.92, 128.41, 128.86, 138.24, 144.29, 144.95,159.71. Accurate mass HRMS (EI+): m/z calcd for C₁₉H₂₈B₁₀O₂(M)⁺396.3102,found 396.3096.

Example 7

Pyridinium chlorochromate (PCC, 2.0 g, 9.34 mmol) was suspended inanhydrous DCM (50 mL). A solution of(RS)-1-[1-(4-methoxyphenyl)-1,12-dicarba-closo-dodecaborane-12-yl]heptane-1-ol(1.7 g, 4.67 mmol) in anhydrous DCM (15 mL) was then added to give adark reaction mixture, which was stirred at room temperature overnight.Diethylether (60 mL) was added and then molecular sieve followed bystirring for 1 h. The supernatant was decanted and the insoluble residuewas washed with dry ether (3×20 mL). The combined organic phases werepassed through a short column of florisil followed by evaporation. Theresidue was purified by silica gel column chromatography (hexanes,R_(f): 0.13) to yield 1.6 g (95%) of a white wax-like solid which had amelting point of 36-37° C.

¹H NMR (CDCl₃): δ 0.87 (t, 3H, CH₃), 1.14-1.46 (m, 8H, 4×CH₂), 1.85-3.0(br. m, 10H, BH), 2.39 (m, 2H, C(O)—CH₂), 3.74 (s, 3H, OCH₃), 6.69 (d,2H, arom., J=9.0 Hz), 7.10 (d, 2H, arom., J=8.9 Hz). ¹³C NMR (CDCl₃): δ14.14, 22.58, 23.60, 28.51, 31.60, 39.39, 55.41, 83.75, 85.64, 113.50,128.28, 128.73, 159.92, 195.48. Accurate mass HRMS (EI+): m/z calcd forC₁₆H₃₀B₁₀O₂(M)⁺ 362.3257, found 362.3254.

Example 8

Borane-tetrahydrofuran complex (16.5 mL, 16.5 mmol, 1.0 M solution inTHF, stabilized with 0.005 M N-isopropyl-N-methyl-tert-butylamine(NIMBA)) followed by (S)-2-methyl-CBS-oxazaborolidine [(S)-MeCBS] (1.65mL, 1.65 mmol, 1.0 M solution in toluene) were added to 15 mL anhydrousTHF. The reaction mixture was stirred at room temperature for 10 minutesand1-[1-(4-methoxyphenyl)-1,12-dicarba-closo-dodecaborane-12-yl]heptane-1-one(600 mg, 1.65 mmol) in 15 mL of anhydrous THF was added slowly over aperiod of 2 h at 25° C. The reaction mixture was stirred for additional6 h at room temperature and then carefully quenched by addition of 2.0 MHCl (30 mL) in small portions to control H₂ development. Diethyl ether(50 mL) was added and the organic phase was washed brine and saturatedNaHCO₃. The organic phase was dried over MgSO₄, filtered, andevaporated. The residue was purified by silica gel column chromatography(hexanes/EtOAc, 19/1, v/v) to yield a white solid. Based on chiral HPLC(CHIRALPAK IB-3 [Chiral Technologies, INC.], hexanes/DCM [9/1], 1 mLflow rate), and analysis of the ¹H NMR spectrum of the correspondingMosher ester, the enantiomeric excess (ee) was estimated to be >85%. Theabsolute configuration was determined by analysis of the ¹H NMR spectrumof the corresponding Mosher ester.

Yield: 440 mg (73%), R_(f): 0.43 (hexanes/EtOAc, 19/1, v/v), m.p.:95-96° C., [α]_(D) ^(20° C.)=+27° (0.1, DCM). ¹H NMR (CDCl₃): δ 0.87 (t,3H, CH₃), 1.15-1.31 (m, 8H, 4×CH₂), 1.38-1.48 (m, 2H, CH₂), 1.58 (br. s,1H, OH), 1.85-3.0 (br. m, 10H, BH), 3.47 (m, 1H, CH), 3.74 (s, 3H,OCH₃), 6.68 (d, 2H, arom., J=9.0 Hz), 7.12 (d, 2H, arom., J=9.0 Hz). ¹³CNMR (CDCl₃): δ 14.20, 22.72, 26.60, 28.98, 31.83, 36.92, 55.40, 73.10,83.53, 86.39, 113.42, 128.43, 128.85, 159.73. Accurate mass HRMS (EI+):m/z calcd for C₁₆H₃₂B₁₀O₂(M)⁺ 364.3414, found 364.3417.

Example 9

For the synthesis of(R)-1-[1-(4-methoxyphenyl)-1,12-dicarba-closo-dodecaborane-12-yl]heptane-1-ol,the procedure and conditions described for the synthesis of(s)-1-[1-(4-methoxyphenyl)-1,12-dicarba-closo-dodecaborane-12-yl]heptane-1-olwere adapted using 500 mg (1.38 mmol) of1-[1-(4-methoxyphenyl)-1,12-dicarba-closo-dodecaborane-12-yl]heptane-1-oneand 1.38 mL (1.38 mmol, 1.0 M solution in toluene) of (R)-MeCBS. Theresidue was purified by silica gel column chromatography (hexanes/EtOAc,19/1, v/v) to yield a white solid. Based on chiral HPLC (CHIRALPAK IB-3[Chiral Technologies, INC.], hexanes/DCM [9/1], 1 mL flow rate), theenantiomeric excess (ee) was estimated to be >85%. The assignment of theabsolute configuration was derived from the analysis of the ¹H-NMRspectrum of the Mosher ester of(S)-1-[1-(4-methoxyphenyl)-1,12-dicarba-closo-dodecaborane-12-yl]heptane-1-ol.

Yield: 400 mg (80%), R_(f): 0.43 (hexanes/EtOAc, 19/1, v/v), m.p.:95-96° C., [α]_(D) ^(20° C.)=−24° (0.1, DCM). ¹H NMR (CDCl₃): δ 0.87 (t,3H, CH₃), 1.15-1.31 (m, 8H, 4×CH₂), 1.38-1.47 (m, 2H, CH₂), 1.57 (br. s,1H, OH), 1.85-3.0 (br. m, 10H, BH), 3.47 (m, 1H, CH), 3.74 (s, 3H,OCH₃), 6.68 (d, 2H, arom., J=9.0 Hz), 7.12 (d, 2H, arom., J=9.0 Hz). ¹³CNMR (CDCl₃): δ 14.20, 22.72, 26.60, 28.99, 31.83, 36.92, 55.40, 73.10,83.54, 86.39, 113.42, 128.43, 128.85, 159.73. Accurate mass HRMS (EI+):m/z calcd for C₁₆H₃₂B₁₀O₂(M)⁺ 364.3414, found 364.3406.

Example 10

To a solution of1-(4-methoxyphenyl)-12-heptyl-1,12-dicarba-closo-dodecaborane (600 mg,1.72 mmol) in anhydrous DCM (40 mL) was added boron tribromide (3.4 mL,3.4 mmol), 1 M solution in DCM) at 0° C. The reaction mixture wasstirred at room temperature overnight, poured carefully into ice-cold 1M HCl (60 mL) and extracted with DCM. The organic phase was washed witha 10% sodium thiosulfate solution and brine and dried over MgSO₄. Thesolvents were evaporated and the residue purified by silica gel columnchromatography (hexanes/EtOAc, 9/1, v/v) to yield a white solid. Furtherpurification can be achieved by recrystallization from pentane orhexanes (−20° C.).

Yield: 380 mg (66%), R_(f): 0.36 (hexanes/EtOAc, 9/1, v/v), m.p.:114-115° C. ¹H NMR (CDCl₃): δ 0.87 (t, 3H, CH₃), 1.08-1.29 (m, 10H,5×CH₂), 1.64 (m, 2H, C_(carborane)—CH₂), 1.85-3.0 (br. m, 10H, BH), 4.68(br. s, 1H, OH), 6.60 (d, 2H, arom., J=8.8 Hz), 7.07 (d, 2H, arom.,J=8.8 Hz). ¹³C NMR (CDCl₃): δ 14.20, 22.73, 29.02, 29.23, 29.67, 31.87,38.04, 80.82, 80.98, 81.21, 114.83, 128.76, 129.30, 155.59. Accuratemass HRMS (ESI): m/z calcd for C₁₅H₂₉B₁₀O (M−1)⁻ 333.3216, found333.3213.

Example 11

To a solution of(RS)-1-[1-(4-methoxyphenyl)-1,12-dicarba-closo-dodecaborane-12-yl]heptane-1-ol(570 mg, 1.57 mmol) in anhydrous DCM (40 mL) was added boron tribromide(4.7 mL, 4.7 mmol, 1 M solution in DCM) at 0° C. The reaction mixturewas stirred at room temperature overnight, poured carefully intoice-cold 1 M HCl (60 mL) and extracted with DCM. The organic phase waswashed with a 10% sodium thiosulfate solution and brine and dried overMgSO₄. The solvents were evaporated and the residue purified by silicagel column chromatography (hexanes/EtOAc, 9/1, v/v) to yield a whitesolid. Further purification can be achieved by recrystallization fromhexanes/i-propanol [24:1] and washing the obtained residue with ice-coldpentane.

Yield: 400 mg (73%), R_(f): 0.23 (hexanes/EtOAc, 9/1, v/v), m.p.:129-130° C. ¹H NMR (CDCl₃): δ 0.87 (t, 3H, CH₃), 1.14-1.30 (m, 8H,4×CH₂), 1.38-1.45 (m, 2H, CH₂), 1.62-1.63 (m, ˜2H, OH & H₂O), 1.85-3.0(br. m, 10H, BH), 3.46 (m, 1H, CH), 4.96 (br. s, 1H, OH), 6.61 (d, 2H,arom., J=8.8 Hz), 7.07 (d, 2H, arom., J=8.9 Hz). ¹³C NMR (CDCl₃): δ14.19, 22.71, 26.58, 28.97, 31.82, 36.91, 73.14, 83.57, 86.37, 114.90,128.68, 129.06, 155.82. Accurate mass HRMS (ESI): m/z calcd forC₁₅H₃₁B₁₀O₂(M+1)⁻ 351.3329, found 351.3322.

Example 12

The procedure and conditions described for the synthesis of(RS)-1-[1-(4-hydroxyphenyl)-1,12-dicarba-closo-dodecaborane-12-yl]heptane-1-olwere adapted using 450 mg (1.4 mmol)(RS)-1-[1-(4-methoxyphenyl)-1,12-dicarba-closo-dodecaborane-12-yl]butane-1-olas the starting material. Purification of the products is carried out bysilica gel column chromatography (hexanes/EtOAc, 9/1, v/v) to yield awhite solid. Further purification can be achieved by recrystallizationfrom hexanes/i-propanol [24:1] and washing the obtained residue withice-cold pentane.

Yield: 265 mg (62%), R_(f): 0.22 (hexanes/EtOAc, 9/1, v/v), m.p.:184-185° C. ¹H NMR (CDCl₃): δ 0.87 (t, 3H, CH₃), 1.15-1.26 (m, 2H, CH₂),1.33-1.51 (m, 2H, CH₂), 1.55 (br.s, ˜2H, OH & H₂O), 1.85-3.0 (br. m,10H, BH), 3.48 (m, 1H, CH), 4.69 (br. s, ˜1H, OH), 6.61 (d, 2H, arom.,J=8.8 Hz), 7.07 (d, 2H, arom., J=8.8 Hz). ¹³C NMR (CDCl₃): δ 13.75,19.82, 38.95, 72.86, 83.41, 86.39, 114.90, 128.71, 129.15, 155.75.Accurate mass HRMS (ESI): m/z calcd for C₁₂H₂₃B₁₀O₂(M−1)⁻ 307.2701,found 307.2700.

Example 13

The procedure and conditions described for the synthesis of(RS)-1-[1-(4-hydroxyphenyl)-1,12-dicarba-closo-dodecaborane-12-yl]heptane-1-olwere adapted using 550 mg (1.46 mmol)(RS)-1-[1-(4-methoxyphenyl)-1,12-dicarba-closo-dodecaborane-12-yl]-6-methylheptane-1-olas the starting material. Purification of the products is carried out bysilica gel column chromatography (hexanes/EtOAc, 9/1, v/v) to yield awhite solid. Further purification can be achieved by recrystallizationfrom hexanes/i-propanol [24:1] and washing the obtained residue withice-cold pentane.

Yield: 340 mg (72%), R_(f): 0.23 (hexanes/EtOAc, 9/1, v/v), m.p.:120-121° C. ¹H NMR (CDCl₃): δ 0.84 (s, 3H, CH₃), S 0.85 (s, 3H, CH₃),1.10-1.28 (m, 6H, 3×CH₂), 1.38-1.45 (m, 2H, CH₂), 1.46-1.52 (m, 1H, CH),1.61 (br.s, ˜2H, OH & H₂O), 1.85-3.0 (br. m, 10H, BH), 3.47 (m, 1H, CH),4.88 (br. s, ˜1H, OH), 6.61 (d, 2H, arom., J=8.8 Hz), 7.07 (d, 2H,arom., J=8.8 Hz). ¹³C NMR (CDCl₃): δ 22.71, 22.78, 26.88, 27.07, 28.04,36.93, 38.94, 73.13, 83.33, 86.38, 114.90, 128.69, 129.09, 155.80.Accurate mass HRMS (ESI): m/z calcd for C₁₆H₃₁B₁₀O₂(M−1)⁻ 363.3322,found 363.3331.

Example 14

The procedure and conditions described for the synthesis of(RS)-1-[1-(4-hydroxyphenyl)-1,12-dicarba-closo-dodecaborane-12-yl]heptane-1-olwere adapted using 250 mg (0.65 mmol)(RS)-1-[1-(4-methoxyphenyl)-1,12-dicarba-closo-dodecaborane-12-yl]-3-phenylpropan-1-olas the starting material. Purification of the products is carried out bysilica gel column chromatography (hexanes/EtOAc, 9/1, v/v) to yield awhite solid. Further purification can be achieved by recrystallizationfrom hexanes/i-propanol [24:1] and washing the obtained residue withice-cold pentane.

Yield: 200 mg (83%), R_(f): 0.15 (hexanes/EtOAc, 9/1, v/v), m.p.:135-136° C. ¹H NMR (CDCl₃): δ 01.49-1.77 (m, 2H, CH₂), 1.70 (br. s, ˜1H,OH), 1.85-3.0 (br. m, 10H, BH), 2.50-2.78 (m, 2H, CH₂), 3.48 (m, 1H,CH), 4.81 (br. s, 1H, OH), 6.60 (d, 2H, arom., J=8.8 Hz), 7.06 (d, 2H,arom., J=8.8 Hz), 7.14 (d, 2H, arom.), 7.19 (t, 1H, arom.), 7.28 (t, 2H,arom.). ¹³C NMR (CDCl₃): δ 32.68, 38.29, 72.35, 83.56, 86.01, 126.20,128.52, 128.61, 128.68, 129.04, 141.12, 155.78. Accurate mass HRMS(ESI): m/z calcd for C₁₇H₂₅B₁₀O₂(M−1)⁻ 369.2852, found 369.2851.

Example 15

The procedure and conditions described for the synthesis of(RS)-1-[1-(4-hydroxyphenyl)-1,12-dicarba-closo-dodecaborane-12-yl]heptane-1-olwere adapted using 280 mg (0.63 mmol)(RS)-(2,3-dihydro-1H-inden-5-yl)-[1-(4-methoxyphenyl)-1,12-dicarba-closo-dodecaborane-12-yl]methanolas the starting material. Purification of the products is carried out bysilica gel column chromatography (hexanes/EtOAc, 9/1, v/v) to yield awhite solid. Further purification can be achieved by refluxing asuspension of the product in hexanes/i-propanol [24:1] and, aftercooling the suspension to 0° C., washing the obtained residue withice-cold pentane.

Yield: 240 mg (89%), R_(f): 0.19 (hexanes/EtOAc, 9/1, v/v), m.p.: 231°C. (decomp.). ¹H NMR (Acetone-d₆): δ 1.9-3.0 (br. m, 10H, BH), 2.06 (m,˜2H, CH₂), 2.88 (m, ˜4H, 2×CH₂), 4.68 (s, H, OH), 4.99 (m, 1H, CH), 6.66(d, 2H, arom., J=8.6 Hz), 6.97 (d, 1H, arom.), 7.05 (d, 2H, arom., J=8.9Hz), 7.08 (s, 1H, arom.), 7.13 (d, 2H, arom.), 8.51 (s, H, OH). ¹³C NMR(Acetone-d₆): δ 26.41, 33.09, 33.31, 75.96, 84.58, 88.01, 115.65,123.59, 124.21, 125.86, 128.30, 129.09, 140.63, 144.24, 144.71, 158.58.Accurate mass HRMS (ESI): m/z calcd for C₁₈H₂₅B₁₀O₂ (M−1)⁻ 381.2852,found 381.2855.

Example 16

To a solution of1-[1-(4-methoxyphenyl)-1,12-dicarba-closo-dodecaborane-12-yl]heptane-1-one(630 mg, 1.74 mmol) in anhydrous DCM (40 mL) was added boron tribromide(5.2 mL, 5.2 mmol, 1 M solution in DCM) at 0° C. The reaction mixturewas stirred at room temperature overnight, poured carefully intoice-cold 1 M HCl (60 mL) and extracted with DCM. The organic phase waswashed with a 10% sodium thiosulfate solution and brine and dried overMgSO₄. The solvents were evaporated and the residue purified by silicagel column chromatography (hexanes/EtOAc, 9/1, v/v) to yield a whitesolid. Further purification can be achieved by recrystallization frompentane or hexanes (−20° C.).

Yield: 520 mg (86%), R_(f): 0.31 (hexanes/EtOAc, 9/1, v/v), m.p.: 79-80°C. ¹H NMR (CDCl₃): δ 0.86 (t, 3H, CH₃), 1.12-1.27 (m, 6H, 3×CH₂),1.39-1.46 (m, 2H, CH₂), 1.55-3.40 (br. m, 10H, BH), 2.39 (t, 2H,C(O)—CH₂), 5.11 (br. s, 1H, OH), 6.62 (d, 2H, arom., J=8.7 Hz), 7.05 (d,2H, arom., J=8.9 Hz). ¹³C NMR (CDCl₃): δ 14.09, 22.52, 23.53, 28.44,31.54, 39.40, 83.61, 85.83, 114.95, 128.49, 128.87, 155.99, 195.87.Accurate mass HRMS (ESI): m/z calcd for C₁₅H₂₇B₁₀O₂(M−1)⁻ 347.3001,found 347.3014.

Example 17

The procedure and conditions described for the synthesis of(RS)-1-[1-(4-hydroxyphenyl)-1,12-dicarba-closo-dodecaborane-12-yl]heptane-1-olwere adapted using 300 mg (0.825 mmol)(S)-1-[1-(4-methoxyphenyl)-1,12-dicarba-closo-dodecaborane-12-yl]heptane-1-olas the starting material. Purification of the products is carried out bysilica gel column chromatography (hexanes/EtOAc, 9/1, v/v) to yield awhite solid. Further purification can be achieved by refluxing asuspension of the product in hexanes/i-propanol [24:1] and, aftercooling the suspension to 0° C., washing the obtained residue withice-cold pentane. The enantiomeric excess (ee) was estimated to be >85%according to analysis of the ¹H-NMR spectrum of the corresponding Mosherester. The absolute configuration was determined by analysis of the¹H-NMR spectrum of the corresponding Mosher ester.

Yield: 220 mg (76%), R_(f): 0.23 (hexanes/EtOAc, 9/1, v/v), m.p.:120-121° C., [α]_(D) ^(20° C.)=+23° (0.1, DCM). ¹H NMR (CDCl₃): δ 0.87(t, 3H, CH₃), 1.15-1.30 (m, 8H, 4×CH₂), 1.39-1.45 (m, 2H, CH₂),1.66-1.71 (m, 2H, OH & H₂O), 1.85-3.0 (br. m, 10H, BH), 3.46 (m, 1H,CH), 5.08 (br. s, 1H, OH), 6.61 (d, 2H, arom., J=8.8 Hz), 7.07 (d, 2H,arom., J=8.9 Hz). ¹³C NMR (CDCl₃): δ 14.19, 22.70, 26.58, 28.97, 31.81,36.90, 73.16, 83.49, 86.33, 114.90, 128.67, 129.03, 155.84. Accuratemass HRMS (ESI): m/z calcd for C₁₅H₂₉B₁₀O₂ (M−1)⁻ 349.3165, found349.3162.

Example 18

The procedure and conditions described for the synthesis of(RS)-1-[1-(4-hydroxyphenyl)-1,12-dicarba-closo-dodecaborane-12-yl]heptane-1-olwere adapted using 300 mg (0.825 mmol)(R)-1-[1-(4-methoxyphenyl)-1,12-dicarba-closo-dodecaborane-12-yl]heptane-1-olas the starting material. Purification of the products is carried out bysilica gel column chromatography (hexanes/EtOAc, 9/1, v/v) to yield awhite solid. Further purification can be achieved by refluxing asuspension of the product in hexanes/i-propanol [24:1] and, aftercooling the suspension to 0° C., washing the obtained residue withice-cold pentane. The enantiomeric excess (ee) was estimated to be >85%according to analysis of the ¹H-NMR spectrum of the corresponding Mosherester. The absolute configuration was determined by analysis of the¹H-NMR spectrum of the corresponding Mosher ester.

Yield: 180 mg (62%), R_(f): 0.23 (hexanes/EtOAc, 9/1, v/v), m.p.:120-121° C., [α]_(D) ^(20° C.)=−28° (0.1, DCM). ¹H NMR (CDCl₃): δ 0.87(t, 3H, CH₃), 1.15-1.30 (m, 8H, 4×CH₂), 1.39-1.45 (m, 2H, CH₂),1.68-1.76 (m, 2H, OH & H₂O), 1.9-3.0 (br. m, 10H, BH), 3.47 (m, 1H, CH),5.17 (br. s, 1H, OH), 6.61 (d, 2H, arom., J=8.8 Hz), 7.07 (d, 2H, arom.,J=8.9 Hz). ¹³C NMR (CDCl₃): δ 14.19, 22.70, 26.58, 28.96, 31.81, 36.90,73.17, 83.50, 86.31, 114.90, 128.67, 129.01, 155.86. Accurate mass HRMS(ESI): m/z calcd for C₁₅H₂₉B₁₀O₂(M−1)⁻ 349.3165, found 349.3158.

Example 19

Estrogen receptor beta (ERβ) agonists have the potential to function astumor suppressors in the treatment of cancers, such as breast, colon,and prostate cancer. Such agents can also be used in the treatment ofinflammatory diseases, such as arthritis and inflammatory bowel disease,as well as in some neurodegenerative and psychotropic disorders.

A library of twenty two compounds (Table 2) was synthesized (forexample, as described above or using methods derived therefrom), andbiologically evaluated in vitro for estrogen receptor beta (ERβ)selective agonist activity. The library of twenty two compounds wassynthesized based on reference compounds (Table 1). Within synthesizedstructures (Table 2), the B and C rings of the endogenous ligand E2 werereplaced with a carborane cluster. The hydrophobicity character and thespherical geometry of the carborane can play a role in enhancing thebinding affinity of ligands to estrogen receptor.

In addition to the three reference compounds (Table 1) and the libraryof twenty two synthesized compounds (Table 2), three compounds describedby Thirumamagal, B T S et al. (Bioconj. Chem. 2006, 17, 114-1150) werealso included in the in vitro evaluation of ERβ selective agonistactivity (Table 3).

The selectivity and potency of the various compounds was carried out viain vitro testing in ERα and ERβ cell-based reporter assays. The activityof the selected compounds was determined in the cell-based reporterassays in HEK293 cells. The HEK293 cell line was chosen as it does notexpress endogenous ERα or ERβ at significant levels.

The HEK293 cells were propagated in a monolayer in phenol red-free DMEMsupplemented with 10% fetal bovine serum, 2 mM Glutamax andpenicillin/streptomycin (Thermo Fisher Scientific, MA, USA) andincubated in a 5% CO₂ humidified atmosphere at 37° C. Right beforetransfection, the growth medium was changed to phenol red-free DMEMsupplemented with 4% HyClone Fetal Bovine Serum, Charcoal/DextranTreated (GE Healthcare Life Sciences, USA) and 2 mM Glutamax (starvationmedium). The cells were transfected with the expression vector encodinghuman full-length ERα or ERβ and with the reporter vector containing 3repeats of estrogen responsive elements (ERE) followed by the minimalthymidine kinase promoter from the herpes simplex virus in the pGL4vector (Promega, USA). Luciferase served as a reporter gene. Thetransfection was carried out in 10 cm dishes (Nunc) in the starvationmedium. After 24 hours, the cells were trypsinized, counted and seededto cell culture treated, white, solid 1536-well plates (Corning Inc.,NY, USA) at 1500 cells/well in 4 μl of total media volume. The compoundsto be tested were diluted in DMSO and transferred to the cells using anacoustic dispenser Echo 520 (Labcyte). The compounds were tested atleast at 12 different concentration points in the range from 10 μM to100 pM, in triplicates. Luciferase activity was determined after 24hours of incubation with compounds with Britelite plus luciferasereporter gene assay reagent (Perkin Elmer, USA), according to themanufacturer protocol. The luciferase signal was measured on an Envisonmultimode plate reader (Perkin Elmer, USA). Data were collected andprocessed using an in-house built LIMS system ScreenX and GraphPad Prismsoftware. EC₅₀ values were calculated using a regression function (doseresponse, variable slope). The assay description is summarized in Table4.

The results of the in vitro evaluation of the compounds for estrogenreceptor beta (ERβ) selective agonist activity are summarized in Table5. Experiments on compound 04 indicated it had an EC₅₀ at ERα of >5000nM and an EC₅₀ at ERβ of 46 nM, indicating a high ERβ selectivity.Experiments on compound 05 indicated it had an EC₅₀ at ERα of >5000 nMand an EC₅₀ at ERβ of 64 nM, indicating a high ERβ selectivity.

The results (Table 5) indicated that the active carboranyl compounds ofthe synthesized library were those where the para-hydrophenyl-ring(A-ring) of E2 was retained to allow for hydrogen bond- and pi-stackinginteractions with the receptor. The results further indicated that theactive compounds from the synthesized library were those where theD-ring of E2, containing a 17β-hydroxyl group, was replaced with analkyl- or a 1-hydroxyalkyl group. The latter structural element appearedto be related to selectivity for ERβ.

One promising compound of this library was1-(4-hydoxyphenyl)-12-(1-hydroxyheptyl)-1,12-dicarba-closo-dodecaborane(06). Evaluation of this compound in a luciferase reporter-based cellassay in human embryonic kidney (HEK) cells (Sedlak, D. et al. Comb.Chem. High T. Scr. 2011, 14, 248-266) resulted in an EC₅₀ of 5 nM at ERβand an ERβ-to-ERα agonist ratio of 1,800. For comparison, the standardERβ selective agonist diarylpropionitrile (DPN) had an EC₅₀ of 6.3 nMand an ERβ-to-ERα agonist ratio of 358.

TABLE 1 Reference Compounds. Compound Name Structure Estradiol (E2)

Diarylpropionitrile (DPN) (ERβ selective agonist)

Propyl pyrazole triol (PPT) (ERα selective agonist)

TABLE 2 Synthesized library of compounds. Compound Structure 04

05

06

07

08

09

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

TABLE 3 Compounds from Thirumamagal BTS et al. Bioconj. Chem. 2006, 17,114-1150. Com- pound Structure 01

02

03

TABLE 4 Assay description Cell incubation Reporter Steroid ReporterGenetic with Antagonist Assay Assay assay mode receptor vector Cellsmodification compounds mode readout reagent ERα Agonist Human pGL4-HEK293 Transiently 24 hours — Luciferase Britelite full-length 3xERE-transfected (luminescence) Plus ERα Luc2 cells (Perkin Elmer) ERβAgonist Human pGL4- HEK293 Transiently 24 hours — Luciferase Britelitefull-length 3xERE- transfected (luminescence) (Perkin ERβ Luc2 cellsElmer) AR Agonist Human pGL4- U2OS Stable 24 hours Luciferase Britelitefull-length MMTV- transfectants, (luminescence) (Perkin AR Luc2 clone 22Elmer) AR Antagonist Human pGL4- U2OS Stable 24 hours 2 nM LuciferaseBritelite full-length MMTV- transfectants, Dihydro- (luminescence)(Perkin AR Luc2 clone 22 testosterone Elmer) GR Agonist Human pGL4- U2OSStable 24 hours Luciferase Britelite full-length MMTV- transfectants,(luminescence) (Perkin GR Luc2 clone 26 Elmer) GR Antagonist Human pGL4-U2OS Stable 24 hours 10 nM Luciferase Britelite full-length MMTV-transfectants, Dexa- (luminescence) (Perkin GR Luc2 clone 26 methasoneElmer) Viability — — — HEK293 — 24 hours Luciferase ATPlite(luminescence) 1 step (Perkin Elmer)

TABLE 5 Results of in vitro testing of the compounds in ERα and ERβcell-based reporter assays. ERα ERβ Log(EC₅₀) EC₅₀ Efficacy Log(EC₅₀)EC₅₀ Efficacy ERβ compound (M) SD (nM) (%) SD (M) SD (nM) (%) SDSelectivity E2 −10.16 0.16 0.07 99 6.1 −10.58 0.10 0.03 93 2.7 2.7 DPN−5.78 0.11 1668 95 8.7 −8.88 0.06 1.33 113 2.4 1252 PPT −8.48 0.13 3.3101 7.2 low low 01 −5.11 0.02 7810 80 1.7 low low 02 Trial 1 −5.49 0.083268 120 7.9 −7.48 0.05 33 110 2.5 99 Trial 2 −5.17 0.01 6684 93 −6.560.07 277 95 4.3 24 03 −4.20 1.98 92635 −5.56 0.07 2780 64 4.5 04 Trial 1−4.46 0.03 35000 57 2.7 −5.89 0.01 1292 47 0.4 Trial 2 −5.90 0.11 1251113 9.7 −7.10 0.07 80 96 3.4 16 05 low low −5.22 0.04 5997 77 2.6 06Trial 1 −5.78 0.31 1647 30 9.4 −7.71 0.08 19 100 3.5 85 Trial 2 −5.510.02 3092 66 1.9 −7.76 0.07 17 103 4.0 177 07 −7.12 0.03 75 104 3.0−8.02 0.15 10 90 5.0 7.8 08 −4.75 1.09 17985 −7.05 0.08 90 68 3.1 200 09−4.58 2.61 26034 −6.60 0.05 253 55 2.0 103 10 low low −6.76 0.07 175 553.2 >571 11 −6.77 0.10 168 96 7.8 −8.57 0.07 2.7 86 2.9 62 12 Trial 1−7.45 0.08 36 101 4.8 −8.89 0,11 1.3 85 4.1 28 Trial 2 −7.53 0.09 30 945.3 −8.94 0.07 1.14 104 2.8 26 13 −7.13 0.07 74 94 4.3 −8.86 0.11 1.4 974.1 54 14 low low low low 15 low low low low 16 low low low low 17 lowlow low low 18 low low low low 19 low low low low 20 −4.89 0.15 12815−7.46 0.05 35 81 2.6 368 21 −5.55 0.04 2808 54 2.7 −6.82 0.06 151 66 2.519 22 −6.07 0.07 857 65 6.0 −7.54 0.08 29 32 1.9 30 23 −5.96 0.01 1096−7.45 0.03 36 75 1.5 31 24 −5.00 0.11 10112 −7.40 0.04 40 91 1.9 253 25−5.51 0.04 3114 −7.54 0.06 29 8 2.5 108 Trial 1, Trial 2 = for compoundswith multiple trials reported, Trial 2 data is believed to be morereliable, but all data reported here for completeness. Low = activitydetected, but activity was so low that exact value not reported. >, <=exact value could not be determined from the tested concentration range.

Example 20

The family of steroid receptors consists of six highly evolutionaryconserved, but structurally related receptors. Natural ligands forsteroid receptors are structurally even more related and despite theirhigh similarity, they can bind very selectively to their dedicatedtarget. For example, cortisol is the ligand of the glucocorticoidreceptor and it does not interact with estrogen receptors.

As discussed above, the library of carborane derivatives showspreferential activation of ERβ over ERα, based on profiling over a wideconcentration range. It is however possible that these carboranederivatives, being a new class of artificially prepared ERβ ligands andstructurally unrelated to the natural estrogen hormones, can have adifferent activity profile and can interact with the remaining membersof the steroid receptor family, such as with androgen receptor. Suchunwanted activity would have profound biological consequences.

To evaluate the off-target activities of the carborane compounds onother steroid receptors, androgen receptor (AR) and glucocorticoidreceptor (GR) cell-based luciferase reporter assays were performed inthe same manner as the estrogen receptor (ER) reporter assays describedabove (Sedlak, D. et al. Comb. Chem. High T. Scr. 2011, 14, 248-266).The compounds tested were E2, DPN, PPT, 01, 02, 03, 04, 05, 06, 07, 08,09, 10, 11, 12, 13, 20, 21, 22, 23, 24, and 25. The AR and GR assaydescriptions are summarized in Table 4. The assays were carried out withstable reporter cell lines expressing full-length AR or GR in theosteosarcoma U2OS cell line with no endogenous expression of thesereceptors. The experiment was performed in the agonist and antagonistmode to detect all possible interactions of compounds with the receptor.In the antagonist mode, dihydrotestosterone (DHT) or dexamethasone wasadded to the cell culture 1 hour after the compound addition to thefinal concentration of 2 nM or 10 nM, for the AR and GR reporter assay,respectively. In the concentration range tested (100 μM to 100 pM), noagonistic or antagonistic activities on AR or GR were detected for thetested compounds, suggesting that the activity of carborane derivativesis restricted to ERβ only.

Example 21

The in vitro cytotoxicity of the compounds was assessed by running aviability assay on HEK293 cells parallel to the ERα and ERβ reporterassays to ensure the comparability of the obtained results. Thenon-transfected HEK293 cells were seeded to the 384-well plates at 5000cell/well, compounds were added and the timing of all subsequent stepswas exactly the same as in the reporter assays. The compounds testedwere E2, DPN, PPT, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13,20, 21, 22, 23, 24, and 25. After 24 h of compound incubation withcells, the viability of cells was measured by determining the ATP levelin the samples using luciferase cell viability assay, ATPlite 1step(Perkin Elmer, USA). The results are summarized in Table 6 and show thatthe compounds are non-toxic or they show a marginal cytotoxicity at thehighest concentrations tested (IC₅₀>20 μM).

TABLE 6 Results of the in vitro cytotoxicity of the compounds in theHEK293 viability assay. HEK293 Compound viability IC₅₀ (μM) E2 Low DPNLow PPT Low 01 37 02 Trial 1 Low Trial 2 42 03 84 04 Trial 1 25 Trial 245 05 Low 06 Trial 1 18 Trial 2 17 07 33 08 33 09 35 10 16 11 34 12Trial 1 34 Trial 2 32 13 47 20 16 21 24 22 21 23 18 24 20 25 19 Trial 1,Trial 2 = for compounds with multiple trials reported, Trial 2 data isbelieved to be more reliable, but all data reported here forcompleteness. Low = activity detected, but activity was so low thatexact value not reported.

Unless defined otherwise, all technical and scientific terms used hereinhave the same meanings as commonly understood by one of skill in the artto which the disclosed invention belongs. Publications cited herein andthe materials for which they are cited are specifically incorporated byreference.

Those skilled in the art will recognize, or be able to ascertain usingno more than routine experimentation, many equivalents to the specificembodiments of the invention described herein. Such equivalents areintended to be encompassed by the following claims.

What is claimed is:
 1. A compound defined by Formula IV, or apharmaceutically acceptable salt thereof:

wherein Q is a substituted or unsubstituted dicarba-closo-dodecaboranecluster, and

are attached to Q in a para configuration; the dotted line to Yindicates that the bond can be a single bond or a double bond, asvalence permits; X is OH, NHR², SH, or S(O)(O)NHR²; Y is O, OR^(2′),NHR², SH, or S(O)(O)NHR²; R⁶ is substituted or unsubstituted C₂-C₂₀alkyl, substituted or unsubstituted C₂-C₂₀ alkenyl, substituted orunsubstituted C₂-C₂₀ alkynyl, substituted or unsubstituted C₂-C₂₀alkylaryl, substituted or unsubstituted C₄-C₂₀ alkylcycloalkyl, orNR³R⁴; R² is H, OH, halogen, or substituted or unsubstituted C₁-C₄alkyl; R^(2′) is H or substituted or unsubstituted C₁-C₄ alkyl; and R³and R⁴ are independently selected from substituted or unsubstitutedC₁-C₂₀ alkyl, substituted or unsubstituted C₂-C₂₀ alkenyl, substitutedor unsubstituted C₂-C₂₀ alkynyl, substituted or unsubstituted C₂-C₂₀alkylaryl, substituted or unsubstituted C₄-C₂₀ alkylcycloalkyl, orsubstituted or unsubstituted C₁-C₂₀ acyl.


2. The compound of claim 1, wherein Q is

wherein • is a carbon atom or a boron atom; and ∘ is C—H, C-halogen,C-alkyl, C—OH, C—NH₂, B—H, B-halogen, B-alkyl, B—OH, or B—NH₂.
 3. Thecompound of claim 1, wherein the compound is defined by Formula V, or apharmaceutically acceptable salt thereof:

wherein • is a carbon atom; ∘ is B—H, B-halogen, B-alkyl, B—OH, orB—NH₂; the dotted line to Y indicates that the bond can be a single bondor a double bond, as valence permits; X is OH, NHR², SH, or S(O)(O)NHR²;Y is O, OR²′, NHR², SH, or S(O)(O)NHR²; R⁶ is substituted orunsubstituted C₂-C₂₀ alkyl, substituted or unsubstituted C₂-C₂₀ alkenyl,substituted or unsubstituted C₂-C₂₀ alkynyl, substituted orunsubstituted C₂-C₂₀ alkylaryl, substituted or unsubstituted C₄-C₂₀alkylcycloalkyl, or NR³R⁴; R² is H, OH, halogen, or substituted orunsubstituted C₁-C₄ alkyl; R^(2′) is H or substituted or unsubstitutedC₁-C₄ alkyl; and R³ and R⁴ are independently selected from substitutedor unsubstituted C₁-C₂₀ alkyl, substituted or unsubstituted C₂-C₂₀alkenyl, substituted or unsubstituted C₂-C₂₀ alkynyl, substituted orunsubstituted C₂-C₂₀ alkylaryl, substituted or unsubstituted C₄. C₂₀alkylcycloalkyl, or substituted or unsubstituted C₁-C₂₀ acyl.


4. The compound of claim 1, wherein X is OH.
 5. The compound of claim 1,wherein Y is OH.
 6. The compound of claim 1, wherein Y is O.
 7. Thecompound of claim 1, wherein R⁶ is a substituted or unsubstituted C₆-C₁₀alkyl.
 8. The compound of claim 1, wherein R⁶ is a substituted orunsubstituted C₂-C₁₅ alkylaryl.
 9. The compound of claim 1, wherein R⁶is a substituted or unsubstituted C₈-C₂₀ alkylarylcycloalkyl.
 10. Thecompound of claim 1, wherein R⁶ is a substituted or unsubstitutedbranched C₃-C₁₀ alkyl.
 11. A compound selected from the group consistingof:

and pharmaceutically acceptable salts thereof.
 12. The compound of claim1, wherein the compound has an EC₅₀ of 800 nM or less at estrogenreceptor beta (ERβ), an ERβ-to-ERα agonist ratio of 8 or more, or acombination thereof.
 13. A pharmaceutical composition comprising acompound of claim 1 and a pharmaceutically acceptable excipient.
 14. Amethod of treating cancer in a subject having cancer, the methodcomprising administering to the subject a therapeutically effectiveamount of a compound of claim
 1. 15. A method of suppressing tumorgrowth in a subject, the method comprising contacting at least a portionof the tumor with a therapeutically effective amount of a compound ofclaim
 1. 16. A method of treating an inflammatory disease in a subjecthaving the inflammatory disease, the method comprising administering tothe subject a therapeutically effective amount of a compound of claim 1.17. A method of treating a neurodegenerative disease in a subject havingthe neurodegenerative disease, the method comprising administering tothe subject a therapeutically effective amount of a compound of claim 1.18. A method of treating a psychotropic disorder in a subject having thepsychotropic disorder, the method comprising administering to thesubject a therapeutically effective amount of a compound of claim
 1. 19.A method of imaging a cell or a population of cells expressing ERβwithin or about a subject, the method comprising: administering to thesubject an amount of a compound of claim 1; and detecting the compoundof claim
 1. 20. A method comprising administering a therapeuticallyeffective amount of a compound of claim 1 to a cell or a population ofcells expressing ERβ within or about a subject.